No. 19-21

Installation and Conversion Instructions
911 (991)
19 / 21 ENU
0913
0
911 GT3 RS Manthey Performance Kit
Vehicle Type:
911 GT3 RS
Model Year:
As of 2019
Situation:
Retrofitting
Note:
The Manthey Performance Kit for the 911 GT3 RS (type 991.2 ) was developed in close collaboration
between the Porsche Development Center in Weissach and Manthey Racing GmbH.
The Tequipment range is aimed at the target group of motor sports enthusiasts and amateur motor
sports drivers.
NOTICE
•
The components have been tested and approved together. If different from TEQ, the available individual
options must be requested via TEQ.
Parts Info:
991.044.805.05
991 GT3 RS Manthey Performance Kit (with FA lift) for
Magnesium rim
991 GT3 RS Manthey Performance Kit (without FA lift) for
Magnesium rim
991 GT3 RS Manthey Performance Kit (with FA lift) for Aluminium
rim
991 GT3 RS Manthey Performance Kit (without FA lift) for
Aluminium rim
991.044.805.06
991.044.805.07
991.044.805.08
Parts to be ordered separately:
WHT.008.186
4x
 M12 x 1.5 x 62 screws for front brake calliper
991.609.181.80
2x
 Front brake pad wear indicator
999.067.053.09
4x
 M12 x 1.5 x 85 screws for rear brake calliper
991.609.185.00
2x
PAF.003.923
12 x
 Brake pad wear indicator, rear (only necessary if PCCB pads
are installed)
 Lock nut for securing dome bearing to body
999.084.123.09
4x
 Collar nut securing connecting link (anti-roll bar)
PAF.008.550.00
2x
 Lock nut securing damper strut support bearing to piston rod
999.084.445.01
2x
9A7.007.483.00
4x
 Lock nut for connecting lower trailing arm to wheel bearing
housing
 External hexalobular screw for connecting seat frame to body
PAF.008.243
2x
 Screws for hook on rear lid
Tequipment
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Installation and Conversion Instructions
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999.073.509.02
4x
999.085.051.03
4x
 M6 nuts securing wing to wing support
PAD181220
1x
Primer
PAD004660
1x
2K pane adhesive set
D 181802M1
1x
Activator
D 00940104
1x
Cleaning solution
 M6 x 12 screws securing wings to wing support
Suspension alignment: Intermediate plates may be required for adjusting the camber values
on the rear axle. Order the required intermediate plates accordingly:
9F1.505.184.A
2x
 Intermediate plate, 0.5 mm
9F1.505.184.B
2x
 Intermediate plate, 1 mm
9F1.505.184.C
2x
 Intermediate plate, 2 mm
9F1.505.184.D
2x
 Intermediate plate, 4 mm
9F1.505.184.F
2x
 Intermediate plate, 0.3 mm
Also order the following stickers:
95B.010.004
1x
 Vehicle identification number (VIN) sticker, engine code
7PP.010.786.T
1x
 “MOBIL 1” engine oil sticker
Information
Further overviews of the parts are shown before each relevant step.
Information
Please pass all this information on to the customer.
Also hand the race track booklet included with the parts over to the customer.
Information
Some of the repair illustrations show only one side of the vehicle or a similar component
Naturally, some steps also have to be performed on the opposite side of the vehicle as well
Content:
Nov 15, 2023
Page 2 of 48
•
•
•
•
•
•
•
1.
2.
3.
4.
5.
6.
7.
Preliminary work
Chassis assembly
Installation of new brake pads and brake lines
Mounting of the flaps on the front apron
Mounting the air control elements on the underbody
Installation of rear cover and rear wing
Installation of rear wheel covers
•
8. Performing suspension alignment
Tequipment
Installation and Conversion Instructions
911 (991)
19 / 21 ENU
0913
0
Assembly:
Information
Please note the procedure and preliminary work required for painting the rear lid.  Installation and
Conversion Instructions '090800 Preliminary work/Painting MR rear lid'
Information
Some of the repair illustrations show only one side of the vehicle. Naturally, some steps also have to be
performed on the opposite side of the vehicle as well. These must be carried out as a mirror image of the
steps shown.
NOTICE
Vehicle and driver weight
•
Before starting the alignment, please ensure the following conditions are met:

Fuel tank is completely full

Driver's weight (incl. helmet and racing suit) has been determined or enquired about and is placed on the
driver's seat with an equivalent weight
1
Preliminary work
NOTICE
Painting components
•
Risk of warping of components
•
Risk of damage to components

Observe the guidelines and instructions for painting components in the Paint Manual.

Always place parts without tension on the painting devices provided during painting and drying
processes.
1.1
Paint the new carbon rear cover in accordance with the vehicle color code in the workshop
manual.
1.2
Connect battery charger.  Workshop Manual '090800 Battery trickle charge'
Tequipment
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Installation and Conversion Instructions
Chassis assembly. Leave all four wheels removed as described in the Chassis section.
Figure 2
– Kit with 4 dampers/springs/dome bearings including PASM decommissioning kit with a
front axle lift — 991.044.806.57
– Kit with 4 dampers/springs/dome bearings including PASM decommissioning kit without a
front axle lift — 991.044.806.60
 Figure 2 -1- – Shock absorber front axle with a lift — 991.044.806.58 without a lift —
991.044.806.61
 Figure 2 -2- – Shock absorbers, rear axle — 991.044.806.59
 Figure 2 -3- – PASM decommissioning kit
Nov 15, 2023
Page 4 of 48
2.1
Remove all four wheels.  Workshop Manual '090800 Removing and installing wheel with
central bolt'
2.2
Remove front spring strut.  Workshop Manual '090800 Removing and installing front
spring strut'
2.3
Convert the front axle lift system if installed  Workshop Manual '090800 Disassembling
and assembling front spring strut'; otherwise, continue with Step 2.4
Tequipment
Installation and Conversion Instructions
2.4
911 (991)
19 / 21 ENU
0913
0
Convert the front suspension struts with the lift system.
1.
2.
Figure 3
– Carefully mount the lift unit on the housing of the new shock absorber. Push the lift
unit up to the collar on the damper housing (end stop). Align the connection of the
lift unit with the holes in the bottom of the housing. Figure 4 -Arrow and line- Do
not use force during assembly. Never hit the upper edge of the lift unit (gasket) with
a hammer.
Figure 4
– Remove the adjustment wheel for the rebound adjustment from the new damper
unit Figure 4 -1- and the fastening nut  Figure 4 -2-of the damper housing. Do
not completely remove the grub screw  Figure 4 -3-of the adjusting wheel. Only
loosen it. Otherwise, it may get lost!
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3.
4.
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Installation and Conversion Instructions
Figure 5
– Insert the spring package consisting of the helper spring, intermediate ring and
main spring into the damper unit as shown in the picture. The spring package is
always mounted with the helper spring at the top (on the upper spring plate).
Figure 6
– All four components must be installed in the order shown! If necessary, the
arrangement must be corrected! The grooves in the 4 mm/ 0.157 in thick packer
 Figure 6 -1- must point downwards (in the direction of the rebound adjustment).
Tequipment
Installation and Conversion Instructions
5.
6.
911 (991)
19 / 21 ENU
0913
0
Figure 7
– Mount the strut housing. Make sure that the white plastic disc in the lift unit 
Figure 7 -1- is positioned almost centrally. Otherwise, it may become damaged
during assembly! To assemble, set up the damper unit with the piston rod pointing
upwards and assemble the housing from above!
Figure 8
– Push the housing onto the damper unit until the thread of the piston rod protrudes
approx. 10 mm/ 0.394 in  Figure 8 -1- from the housing. To check that it is
correctly positioned, apply slight pressure to the housing and turn the piston rod
by approx. 180° left/right with a suitable open-end wrench. It is possible that the
piston rod has not yet snapped into place in the seat of the housing.
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7.
7.1
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Installation and Conversion Instructions
Figure 9
– If the piston rod is correctly locked in place in the housing, the fastening nut 
Figure 9 -1- can be assembled. Hold the housing under slight pressure to prevent
the piston rod from accidentally slipping out of its seat in the housing. Coat the
thread with Loctite 246 (medium strength). Hexagon nut: Tightening torque
50 Nm (36.9 ftlb.)
Figure 9.1
– Please note that the damper clamping tool for spring struts with lift must be used in
Step 7
Tequipment
Installation and Conversion Instructions
8.
2.5
911 (991)
19 / 21 ENU
0913
0
Figure 10
– Push the adjusting wheel  Figure 10 -1- onto the adjusting shaft and tighten the
grub screw  Figure 10 -2-. Make sure that the end of the adjusting shaft is flush
with the adjusting wheel. Failure to observe this will lead to functional restrictions of
the rebound adjustment. Grub screw: Tightening torque 2.5 Nm (1.8 ftlb.)
Install front spring strut.  Workshop Manual '090800 Removing and installing front spring
strut'
9.
Figure 11
– Camber adjusting plate on the support bearing ( Figure 11 -1-) starting from the
outer stop (minimum camber) is in position as shown  Figure 11. Tighten the four
screws on the camber adjusting plate. Screw: Tightening torque 25 Nm (18.4
ftlb.)
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10.
11.
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Installation and Conversion Instructions
Figure 12
– Place the support bearing over the elongated holes  Figure 12 -1- in the dome
into the center position (picture is different). Fasten the support bearings to the
dome with three new collar nuts. Collar nut: Tightening torque 33 Nm (24.3
ftlb.)
Figure 13
– Roughly set the wheel heights for wheel alignment. On the front axle, the height
from the upper edge of the wheel carrier to the lower edge of the lower spring plate
is set at 62 mm/ 2.44 in Figure 13. If the chassis variant is installed without
a lift system, this measurement is 55 mm/ 2.165 in . Finally, reconnect the lift
system and screw the retaining bracket on tight.
Tequipment
Installation and Conversion Instructions
12.
13.
911 (991)
19 / 21 ENU
0913
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Figure 14 (LHD vehicle)
– Attach the pressure cell  Figure 14 (LHD vehicle) -1- of the damper on the driver's
side with two cable ties on the wiring harness shown  Figure 14 (LHD vehicle) -2-.
Fastening points for right-hand drive vehicles (RL) may vary: Mount the pressure cell
onto the existing wiring harness as with left-hand drive vehicles (LL,  Figure 14
(LHD vehicle)).
Figure 15
– To fasten the pressure cell of the right-hand damper, the holder  Figure 15 -1is mounted on the thread  Figure 15 -2- shown below the interior pollen filter 
Figure 15 -3- using the supplied pan-head screw. Fasten the pressure cell to the
holder with two cable ties. Pan-head screw: Tightening torque 23 Nm (17
ftlb.)
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Installation and Conversion Instructions
Figure 15.1
13.1 – The overview shows the pressure cell  Figure 15.1 -1- in the final installed
position.
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Page 12 of 48
2.6
Leave the electrical plug connection (on the vehicle side) for PASM on all four axles in the
bracket provided for this purpose. Connector remains free.
2.7
Damper setting for the front axle:
Traction stage (purple at the bottom of the
damper):
Position 12
LowSpeed pressure level (purple at the
pressure cell):
Position 5
HighSpeed pressure level (gold at the
pressure cell):
Position 7
Tequipment
911 (991)
Installation and Conversion Instructions
2.8
19 / 21 ENU
0913
0
Remove rear spring strut.  Workshop Manual '090800 Removing and installing rear spring
strut'
14.
Figure 16
– Set the chassis height before installing the rear axle dampers in the vehicle. For
vehicles with and without a lift system, the pre-setting from the lower housing collar
to the lower edge of the spring plate is 104 mm/ 4.09 in  Figure 16. The locking
screw on the spring plate may have to be loosened for adjustment.
2.9
Install rear spring strut.  Workshop Manual '090800 Removing and installing rear spring
strut'
2.10
Damper setting for the rear axle:
Rebound stage (R LowSpeed - purple):
Position 6
Rebound (R Highspeed - gold):
Position 6
Compression level (C LowSpeed - purple):
Position 7
Pressure level (C HighSpeed - gold):
Position 7
2.11
Installation of the decommissioning kit for the active damper control PASM. In order to
avoid error messages/error memory entries after removing and replacing the active shock
absorbers (PASM), it is necessary to connect the supplied decommissioning kit to the control
unit for the chassis control. The control unit for the chassis control is positioned in the area in
front of the engine cover in the interior.
2.12
Remove fire extinguisher .  Workshop Manual '090800 Removing and installing fire extinguisher'
2.13
Remove passenger seat.  Workshop Manual '090800 Removing and installing front seat
(sports bucket seat)'
2.14
Remove rear cover.  Workshop Manual '090800 Removing and installing rear cover
(Coupé)'
Tequipment
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Installation and Conversion Instructions
19/21
2.15
Mount the PASM decommissioning kit.
15.
16.
17.
18.
19.
Figure 17
– Unlock and remove the connector  Figure 17 -1- for the damper control on the
control unit.
– Fix the standard connector plug  Figure 17 -2- to the left of the control unit in the
foam carrier.
– Insert the supplied new central plug in the control unit.
– Attach the resistors as shown above  Figure 17 -3- on the surface below the
control unit, cleaning the adhesive surface beforehand.
– Make sure that all electrical plug contacts are correctly locked.
2.16
Install rear cover.  Workshop Manual '090800 Removing and installing rear cover (Coupé)'
2.17
Install passenger seat.  Workshop Manual '090800 Removing and installing front seat
(sports bucket seat)'
2.18
Install fire extinguishers if included.  Workshop Manual '090800 Removing and installing
fire extinguisher'
2.19
Read out the fault memory and clear it if necessary.  Workshop Manual '090800 Fault
memory for on-board diagnosis'
WARNING
Danger of injury and damage from brake fluid
•
Poisonous if swallowed
•
Irritation and damage to skin
•
Avoid contact with paint surfaces

Only store brake fluid in suitable, labelled containers
Nov 15, 2023
Page 14 of 48
Tequipment
Installation and Conversion Instructions
911 (991)
19 / 21 ENU

Wear protective gloves and goggles

In the event of contact (eyes or skin), wash immediately with water

In the event of contact with paint surfaces, wash off immediately with water - do not wipe off
0913
0
NOTICE
Only change the brake pads on vehicles with PCCB
3
Installation of new brake pads and brake lines.
Figure 18
 Figure 18 -1- – Brake pads, front axle — 991.044.806.36
 Figure 18 -2- – Brake pads, rear axle — 991.044.806.37
 Figure 18 -3- – Brake lines sections (steel braided), front axle and rear axle — 991.044.806.38
3.1
Conversion of front axle area
3.1.1
Remove brake calliper.  Workshop Manual '473919 Removing and installing
front brake calliper'
3.1.2
Replace disc brake pads.  Workshop Manual '473919 Replacing front disc brake
pads'
3.1.3
Replacing brake line
Tequipment
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1.
2.
3.
4.
5.
Nov 15, 2023
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Figure 19
– Remove the screws  Figure 19 -1- and remove the front left and right
brake air guides.
Figure 20
– Loosen the screw connection of the brake line  Figure 20 -1- and
remove the brake line.
– Lay the new brake line in the same way as the standard brake line, attach
it and tighten the screw connection. Brake line screw connection:
Tightening torque 10 Nm (7.4 ftlb.)
– Clean adjacent components of any brake fluid that may have leaked out.
– Mount left and right brake-disc air guides  Figure 20.
Tequipment
Installation and Conversion Instructions
3.1.4
3.2
19 / 21 ENU
0913
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Install brake calliper.  Workshop Manual '473919 Removing and installing front
brake calliper'
Conversion of rear axle area
3.2.1
Remove brake calliper.  Workshop Manual '474119 Removing and installing rear
brake calliper'
3.2.2
Replace disc brake pads on the rear axle.  Workshop Manual '474119 Replacing
rear disc brake pads'
3.2.3
Replacing brake line
1.
2.
3.
3.2.4
3.3
911 (991)
Fig. 21 (sample illustration)
– Loosen the screw connection of the brake line  Fig. 21 (sample illustration) -1- and remove the brake line.
– Lay the new brake line in the same way as the standard brake line, attach
it and tighten the screw connection. Brake line screw connection:
Tightening torque 10 Nm (7.4 ftlb.)
– Clean adjacent components of any brake fluid that may have leaked out.
Install brake calliper.  Workshop Manual '474119 Removing and installing rear
brake calliper'
Bleed brake system.  Workshop Manual '474119 Bleeding brake system'
Tequipment
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Installation and Conversion Instructions
Mounting of the flaps on the front apron.
1
2
3
4.1
– Flap, left — 991.044.806.51
– Flap, right — 991.044.806.52
– Template — 991.044.806.50
Mount the flaps, installation position of the
flaps  Figure 28 -1-. The flaps are mounted
on the side surfaces of the front apron.
Figure 27
1.
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Page 18 of 48
Figure 28
– Thoroughly clean the adhesive surfaces with isopropanol (alcohol). The adhesive
surfaces must be free from dust, dirt and grease of any kind.
Tequipment
911 (991)
Installation and Conversion Instructions
2.
19 / 21 ENU
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Figure 29
– Attach the template  Figure 29 by means of adhesive strips on the side surface
of the front apron. Pay attention to the correct orientation of the template! Place
the template on the reference edge below (transition to the front lip) and on the rear
reference line (edge of the air outlet).
Figure 30
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3.
4.
5.
6.
5
– Remove the protective film from the adhesive tape of the flap and insert the
component on the edge of the adhesive template. Pay attention to the correct
orientation when attaching the flap. The positioning cannot be corrected
afterwards. Press the flap firmly and as flat as possible against the front apron for
10 seconds.
– Remove the template. The flap on the left is now installed. Install the flaps on the
right side the same way.
– Use the reverse side of the template to mount the flap on the right side.
– Only the double-sided adhesive tape used here may be used.
Mounting air control elements in the area of the underbody
1
2
3
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Installation and Conversion Instructions
Figure 31
– Air control element, front left — 991.044.806.10 / front right — 991.044.806.11 (not
shown)
– Air control element, left rear — 991.044.806.12 / right rear — 991.044.806.13 (not
shown)
– Air control element, left inside — 991.044.806.14 / air control element, right inside —
991.044.806.15 (not shown)
Tequipment
Installation and Conversion Instructions
5.1
911 (991)
19 / 21 ENU
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Removing the standard air control elements
1
Figure 32
– Air control element (transition from underbody to wheelhouse)
5.1.1
Remove tapping screws (4 pcs.  Figure 32 -Arrows-) on air control elements
(transition from underbody to wheelhouse  Figure 32 -1-) on the left/right side.
5.1.2
Remove left/right air control elements (transition from underbody to wheelhouse
 Figure 32 -1-); these are NO longer needed.
5.1.3
Remove the aero insert on the front wheelhouse liner (left/right) ( Figure 33).
1
2
Figure 33
– Aero insert (wheelhouse liner, left)
– Screw
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Installation and Conversion Instructions
19/21
Mounting the new air control element (inside) on the underbody cover (front) on the left/right
5.2.1
Mount the respective air control element (inside) with screws (2 pcs.) at the
existing fastening points (front/rear) on the underbody cover (front) on the
corresponding side (left/right) ( Figure 34).
1
2
3
4
5.3
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–
–
–
–
–
Figure 34
Air control element (inside), left side
Rear fastening points (front/rear)
Fastening point (center)
Underbody cover (front)
Please use  Figure 31 as a guide
5.2.2
Replicate middle hole in air control element (inside  Figure 34 -3-) on the
underbody cover (front).
5.2.3
Remove the air control element (inside) again.
5.2.4
Remove underbody cover (front).  Workshop Manual '519219 Removing and
installing cover for front underbody'
5.2.5
Drill a hole ∅ = 6.5 mm/ 0.255 in at the marking.
5.2.6
Position the respective air control element (inside) on the underside of the
underbody cover (front, left/right side) at the fastening points (front/rear).
5.2.7
Mount the air control element (inside) on the underside of the underbody cover
(front) with a new M6 x 30 screw and M6 flange nut at the fastening point (center).
Tightening torque 10 Nm (7.4 ftlb.)
5.2.8
Install underbody cover (front).  Workshop Manual '519219 Removing and
installing cover for front underbody'
Pre-assemble new air control elements at the front
Tequipment
911 (991)
Installation and Conversion Instructions
19 / 21 ENU
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Figure 35
1
2
5.4
– Tapping screw
– Front air control element (left side)
5.3.1
Removing tapping screws ( Figure 35 -1-)
5.3.2
Pre-assemble the air control element (front) with a new ST4.8 x 19 tapping screw
with collar (fastening kit included) on the underbody on the left-hand side ( Figure
35).
Installing new air control elements at the rear
1
Figure 36
– ST4.8 x 19 tapping screw with collar
Tequipment
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Installation and Conversion Instructions
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5.4.1
Mount air control element (rear 991.044.806.12) with ST4.8 x 19 tapping screws
with collar (2 pcs.  Figure 36 -1-) on the underbody on the left side ( Figure
36).
Tightening torque 3.2 Nm (2.4 ftlb.)
5.4.2
Fasten the air control element (rear) with two more ST4.8 x 16 tapping screws
without collar in the area of the wheel arch ( Figure 37).
Tightening torque 3.2 Nm (2.4 ftlb.)
Figure 37
1
5.5
Finally, fastening the air control elements (front) and air control element (inside)
5.5.1
Nov 15, 2023
Page 24 of 48
– ST 4.8 x 16 tapping screw
Fasten the air control element (front) to the underbody with two more ST4.8 x 19
TX27 tapping screws with collar ( Figure 38).
Tequipment
911 (991)
Installation and Conversion Instructions
1
19 / 21 ENU
0913
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Figure 38
– ST4.8 x 19 tapping screws with collar
Tighten all screws. ST 4.8 x 19 tapping screw: Tightening torque 3.2 Nm
(2.4 ftlb.)
5.5.2
Fasten the air control element (inside) with ST 4.8 x 19 screws in the front/rear to
the underbody cover (front) ( Figure 39).
Tightening torque 3.2 Nm (2.4 ftlb.)
Figure 39
1
2
5.6
– Air control element (inside)
– Fastening points
The air control elements are installed on the right-hand side of the vehicle in the same way.
Tequipment
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Installation and Conversion Instructions
Conversion of mounting brackets, rear cover and rear wing.
 Figure 43 -1- –
 Figure 43 -2- –
 Figure 43 -3- –
 Figure 43 -4- –
 Figure 43 -5- –
 Figure 43 -6- –
 Figure 43 -7- –
 Figure 43 -8- –
 Figure 43 -9- –
Figure 43
Rear body reinforcement set
Mounting bracket GT3 RS kit — 991.044.806.53
Mounting bracket spacer
Left wing support GT3 RS kit — 991.044.806.05
Right wing support GT3 RS kit — 991.044.806.06
Rear wing GT3 RS kit — 991.044.806.17
Rear cover CFK GT3 RS kit — 991.044.806.54
Gurney GT3 RS kit — 991.044.806.55
Aero parts fastening kit — 991.044.806.56
Scope of parts for “Rear body reinforcement” set ( Figure 43 -1-):
Nov 15, 2023
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991.044.806.19
1x
Reinforcement for left tail light mounting, inside
991.044.806.20
1x
Reinforcement for right tail light mounting, inside
991.044.806.21
1x
Reinforcement for left tail light mounting, outside
991.044.806.22
1x
Reinforcement for right tail light mounting, outside
991.044.806.23
1x
Reinforcement for rear sealing channel, left
991.044.806.24
1x
Reinforcement for rear sealing channel, right
991.044.806.18
1x
Reinforcement fastening, set
6.1
Remove rear apron.  Workshop Manual '519219 Removing and installing rear apron'
6.2
Remove and dismantle rear lid.  Workshop Manual '519219 Replacing rear lid'
6.3
Remove lock base.  Workshop Manual '519219 Removing and installing rear lid lock base
(cover)'
Tequipment
Installation and Conversion Instructions
1.
2.
911 (991)
19 / 21 ENU
0913
0
Figure 44
– Place the mounting bracket on a suitable surface and remove the lock unit and the
complete cable harness, including all retaining clips. Remove the fastening screws
 Figure 44 -1- on the lock unit. Remove the cable harness with all retaining clips
from the standard mounting bracket.
Figure 45
– Mount the lock unit and the cable harness on the new mounting bracket. Start by
assembling the lock unit. Fasten it with the standard screws at the specified points
 Figure 45 -3-. Screw: Tightening torque 8 Nm (5.9 ftlb.). The two marked
retaining clips for the wire cable of the emergency release  Figure 45 -2- cannot
be used. If the retaining pin of these clips is pressed inwards, they can no longer be
used.
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3.
4.
5.
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Installation and Conversion Instructions
– Next, attach the 12-pin central plug of the mounting bracket. Use the standard
retaining clip for this  Figure 45 -1-. The other fastening points then come about
automatically.
Figure 46
– Place new retaining clips (included) at the points shown  Figure 46 -1- into the
mounting bracket and fasten the wire cable for the emergency release as shown
opposite. Set the mounting bracket aside until it is ready to be installed to the
vehicle.
Figure 47
– Place the two stiffeners (991.044.806.23) and (991.044.806.24) in the positions
shown on the left and right of the rear frame  Figure 47 -A-.
Tequipment
Installation and Conversion Instructions
6.
7.
8.
9.
10.
911 (991)
19 / 21 ENU
0913
0
– For exact positioning, a fastening screw of the mounting bracket is screwed
through the stiffener into the fastening point of the body  Figure 47 -1-.
– Align the hole in the component centered around the screw  Figure 47 -2-.
– In addition, align the component parallel to the sheet metal edge of the rear frame
 Figure 47 -3-.
– Replicate the required holes on the rear frame. Remove the stiffeners again for the
following work steps Figure 49 -1- .
Figure 48
– Center mark the drill holes  Figure 48 -1-. Drill holes with a diameter of 5.0
mm/ 0.197 in at the markings you made in step 1. The holes must be deburred.
Important: When making the holes, pay attention to the cables and components
underneath.
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11.
12.
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Installation and Conversion Instructions
Figure 49
– Clean the area  Figure 49 -1- for fastening the stiffeners with isopropanol. This
step is necessary for the subsequent bonding. Note: The SIKAFLEX 260N body
adhesive required for bonding the components is included in the scope of delivery.
Figure 50
– Clean the adhesive surfaces (underside) on the stiffeners with isopropanol. Apply
a triangular adhesive bead 3 mm/ 0.118 in high according to the adhesive pattern
shown above  Figure 50.
Tequipment
Installation and Conversion Instructions
13.
14.
911 (991)
19 / 21 ENU
0913
0
Figure 51
– Position the stiffener and align it with the holes made in step 2. Finally, attach the
component with the three supplied blind rivets. Note: A minimal lateral leakage
of adhesive is desired. Note that the curing time of the adhesive is 24 hours at an
ambient temperature between 15 °C and 25 °C (59 °F and 77 °F). Use pneumatic
rivet pliers to set the blind rivets.
Figure 52
– Insert the stiffener (991.044.806.20) on the inside of the right lamp box. Replicate
the three required holes on the lamp box and remove the component again for the
following work steps  Figure 52 -1-.
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15.
16.
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Page 32 of 48
Installation and Conversion Instructions
Figure 53
– Center-punch the drill holes. Drill holes with a diameter of 5.0 mm/ 0.197 in at the
markings. The holes must be deburred  Figure 53 -1-. Important: When making
the holes, pay attention to the cables and components underneath.
Figure 54
– Clean all contact surfaces in the lamp box and on the stiffener with isopropanol.
Apply a triangular adhesive bead of 2-3 mm/ 0.079 — 0.118 in on the indicated
adhesive surfaces according to the pattern shown.
Tequipment
Installation and Conversion Instructions
17.
18.
911 (991)
19 / 21 ENU
0913
0
Figure 55
– Position the stiffener and align it with the drill holes. Finally, attach the component
with the three supplied blind rivets  Figure 55 -1-. Note: A minimal lateral
leakage of adhesive is desired. Note that the curing time of the adhesive is 24
hours at an ambient temperature between 15 °C and 25 °C (59 °F and 77 °F). Use
pneumatic rivet pliers to set the blind rivets.
Figure 56
– Prepare the outer stiffener (991.044.806.22) for the right lamp box for installation.
Clean the adhesive surface on the component and on the body with isopropanol.
Apply a 2-3 mm/ 0.079 — 0.118 in high triangular bead of adhesive on the back of
the outer stiffener according to the pattern shown above.
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19.
20.
6.4
Figure 57
– Screw the two stiffeners from the outer stiffener with the supplied M6 x 16 collar
screws (2 pcs.): Tightening torque 10 Nm (7.4 ftlb.).
– The stiffeners on the left side are mounted in the same way.
Assembly of the new mounting bracket/lock base.
21.
22.
23.
24.
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Installation and Conversion Instructions
Figure 58
– Place the new mounting bracket on the vehicle.
– When attaching the mounting bracket, the central plug must be reconnected to the
plug on the vehicle  Figure 58 -1-.
– Place two of the standard screws at the lower fastening points by hand  Figure 58
-2-.
– Install the two sealing caps for engine oil and cooling water  Figure 58 -3-.
Tequipment
Installation and Conversion Instructions
25.
26.
27.
28.
911 (991)
19 / 21 ENU
0913
0
– Fasten the mounting bracket behind the left air inlet with a new M6 x 30 screw 
Figure 58 -4-.
Figure 59
– On the right-hand side behind the air inlet (here dismantled for illustration), the
supplied spacer must be placed between the mounting bracket and the body
Figure 59 -1-. It is fastened with a new M6 x 30 screw and a nut with a washer.
Tightening torque 8 Nm (5.9 ftlb.)
Figure 60
– Mount rubber stopper  Figure 60 -1- (engine compartment flushing fan mount) in
the mounting bracket.
– Tighten standard screws (step 23)  Figure 58 -2-: Tightening torque 35 Nm
(25.8 ftlb.)
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29.
30.
31.
32.
6.5
– Install caps  Figure 60 -3-.
– Establish electrical plug connection (fan control) to engine compartment flushing
fan. Mount the engine compartment flush fan in rubber stopper, making sure that
the electrical cable is not touching/chafing anywhere.
Figure 61
– Position the new wing support and fasten it with three M8 x 30 screws at the points
 Figure 61 -2- shown and with an M8 x 60 screw at the upper fastening point 
Figure 61 -1-. Tightening torque: 30 Nm (22 ftlb.)
– The wing support is installed on the right-hand side of the vehicle in the same way.
Installation of the new hinge lock
33.
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Page 36 of 48
Installation and Conversion Instructions
Figure 62
– Lifting the right engine cover hinge  Figure 62 -1-
Tequipment
911 (991)
Installation and Conversion Instructions
19 / 21 ENU
0913
34.
– Loosening the two fastening screws  Figure 62 -2- of the hinge lock
35.
Figure 63
– Remove the two fastening screws together with the original locking device,
washers  Figure 63 -1- Figure 63 -2- and the sockets  Figure 63 -3-
0
Figure 64
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36.
37.
Nov 15, 2023
Page 38 of 48
Installation and Conversion Instructions
Figure 65
– Mount the new hinge lock  Figure 65 -1- with the components removed under
position 35 (screw and washer) in the first step on the rear hinge arm  Figure 65
-2-. There is no socket for the rear screw connection.
Figure 66
– Attach the new hinge lock  Figure 66 -1- in position so that the screw  Figure 66
-2- can be attached to the front hinge arm.
Tequipment
Installation and Conversion Instructions
38.
911 (991)
19 / 21 ENU
0913
0
Figure 67
– Make sure that all fasteners are installed in the correct order. There is no sleeve for
the rear connection.
Tighten both screws at 6 Nm (4.5 fltb.).
6.6
Install rear apron.  Workshop Manual '519219 Removing and installing rear apron'
6.7
Installation of new rear cover and gurney.
39.
Figure 68
– Place the new rear cover on the hinges. Check That the retaining lugs on the hinges
snap into the recesses in the rear cover  Figure 68 -1-.
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40.
41.
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Installation and Conversion Instructions
Fig. 69 (sample illustration)
– Fasten the rear cover with the standard screws  Fig. 69 (sample illustration) -1-.
Insert the standard wiring harness for the third brake light through the opening in
the rear cover  Fig. 69 (sample illustration) -2-. Check that the rubber sleeve
is installed correctly. Close the rear cover and, if necessary, correct the gap
dimensions at the transitions to the adjacent body parts. Screw: Tightening
torque 10 Nm (7.4 ftlb.)
Fig. 70 (sample illustration)
– Attach the supplied spacers for the upper air intake to the fastening points  Fig.
70 (sample illustration) -1- shown. Note:The spacers should be glued on with
the standard Porsche windshield adhesive. Please order the primer and 2K pane
adhesive set mentioned in the parts list at the beginning of the document. They will
then adhere to the rear cover, but their position can still be shifted.
Tequipment
Installation and Conversion Instructions
911 (991)
19 / 21 ENU
0913
0
42.
Fig. 71 (sample illustration)
– Mount the upper air inlet with the standard screws  Fig. 71 (sample illustration)
-1-.
43.
44.
45.
Fig. 72 (sample illustration)
– Mount the rear exhaust grille on the new rear cover with new screws (M5 x 20).
– Mount the stop buffer (standard).
– Mount lock hook with NEW microencapsulated screws (2 pcs.). Tightening
torque 10 Nm (7.4 ftlb.)
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Installation and Conversion Instructions
Renew the engine identification sticker on the cover on the right.
46.
Nov 15, 2023
Page 42 of 48
Fig. 73 (sample illustration)
– Clean the adhesive areas for the Gurney on the top and back of the rear cover with
isopropanol  Fig. 73 (sample illustration) -1-.
Tequipment
911 (991)
Installation and Conversion Instructions
47.
48.
49.
19 / 21 ENU
0913
0
Figure 74
– Put on gurney. Note: Make sure there is an even gap between the gurney and the
rear wing bracket. This must be the same on both sides.
– Remove approx. 5 cm of the backing film from the adhesive strip on the gurney and
position this piece of the film such that it protrudes when the gurney is attached
 Figure 74.
– First, slowly pull the backing film from under the gurney at the rear of the rear cover
while pressing the gurney firmly against the rear cover. In the next step, pull off the
carrier film at the top between the gurney and the rear cover and press the gurney
firmly against the rear cover  Figure 74. Note: Press the adhesive surfaces as
flat as possible for at least 10 seconds
Figure 75
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50.
51.
52.
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Installation and Conversion Instructions
– Note: Make sure to position the standard spacers  Figure 75 -1- between the
wing and wing support connection during assembly. Failure to observe this can lead
to damage.
– Mount the new rear wing on the wing supports. Note: The standard screws can
be re-used, but must be inserted with screw locking agent "Loctite 241" when
reassembling. Tightening torque 10 Nm (7.4 ftlb.)
Figure 76
– The incline of the rear wing can be adjusted using three holes in the front fastening
straps  Figure 76. Wing position 3 represents the standard setting (delivery
status).
Tequipment
Installation and Conversion Instructions
7
911 (991)
19 / 21 ENU
0913
0
Mounting of the wheel covers on the rear axle wheels. (Mounting different for aluminium rims, wheel
cover for aluminium wheel structurally different)
 Figure 77 -1- –
 Figure 77 -2- –
 Figure 77 -3- –
 Figure 77 -4- –
 Figure 77 -5- –
7.1
Figure 77
Set of wheel covers for magnesium rims — 991.044.806.27
Wheel cover
Fastening ring
Rim protection sticker — 991.044.806.29
M5 x 12 pan-head screw
Install wheel covers.
1.
Figure 78
– Clean the surfaces for installing the rim protectors on the front and sides  Figure
78 -1- on all spokes (7 x) of each wheel. Before attaching the wheel covers, the
adhesive areas for the rim protectors on the new rims must be degreased using a
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2.
3.
4.
5.
6.
7.
7.2
Chassis:
8
Installation and Conversion Instructions
19/21
suitable cleaning agent. (Isopropanol). Rims that have already been used must be
thoroughly cleaned and freed from brake dust.
– Attach a rim protector to all seven spokes. Make sure to adhere the side wings
of the stickers carefully around the spokes. The rim protectors should be heated
with a hair dryer to make it easier to adhere them all around. Important: If the
rim protectors are not attached, there may be chafing points on the paint surface.
Please perform a visual inspection every time you dismantle them and replace if
damaged!
Figure 79
– Put the wheel cover  Figure 79 -1- into the rim from the front. Make sure to push
the wheel cover completely into the rim.
– Attach the fastening ring  Figure 79 -2- from within.
– Attach the ring to the wheel cover with M5 x 12 pan-head screws Figure 79 -3(7 pcs.): Tightening torque 2.5 Nm (1.8 ftlb.)
– The wheel cover on the second rear axle wheel is assembled in the same way.
– Important: Balance wheels AFTER mounting the wheel covers.  Workshop
Manual '519219 Balancing/optimising wheels'
Install all four wheels.  Workshop Manual '519219 Removing and installing wheel with
central bolt'
Perform complete alignment.
For further information, see also: Instructions for the measuring wheel system.  Installation and
Conversion Instructions '440000 Measuring wheel system'
8.1
Measuring criteria:
•
•
Nov 15, 2023
Page 46 of 48
Front tires: Michelin Cup 2 ZR 265/35 R20
Rear tires: Michelin Cup 2 ZR 325/30 R21
Tequipment
911 (991)
Installation and Conversion Instructions
•
•
•
19 / 21 ENU
0
Tank capacity: Full
Driver ballast: Driver weight
Rear wing: Position 3
Damper clicking
Front axle
Rebound stage (R)
LowSpeed (purple)
Rear axle
6
12
Rebound stage (R)
HighSpeed (gold)
Compression (C) LowSpeed
(purple)
6
5
7
7
7
Steel anti-roll bar
Rear position = soft
Center position = medium
CRFP anti-roll bar
Rear position = soft
Rear position = soft
Ride height
109.0 mm/ 4.29 in
268.0 mm/ 10.55 in
86 mm/ 3.39 in (offset:
-23 mm/ 0.9 in)
256 mm/ 10.08 in (offset:
-12 mm/ 0.47 in)
Compression (C) HighSpeed
(gold)
Driving height on measuring
wheel system
8.2
0913
Measurement log:
Measurement log (executing PORSCHE center)
Wheel alignment values
(worldwide)
Initial reading
Setpoint values
Final
measurement
Front axle
Toe
unpressed (total)
+ 2 mm/ 0.078 in
Camber
with wheels in straight-ahead
position
- 2.6°
Rear axle
Toe
per wheel
+ 2 mm/ 0.078 in
Camber
- 2.6°
Installed on:
Mechanic:
Acceptance:
Stamp:
(Date)
(First Name)
(Name of
Foreman)
(Porsche Center)
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Installation and Conversion Instructions
Labor time: 1100 TU
00 19 22 66:
911 GT3 RS Manthey Performance Kit
Includes:
911 GT3 RS Manthey Performance Kit installed, vehicle
aligned and adjusted.
55 90 61 51:
Painting new parts of rear lid
Includes:
Painting of new parts, step 1:
Materials: 6 MU
Labor time: 90 TU
51 01 71 05:
Body paint finish prepared
Includes:
Order-related
Painting of new parts, step 1
Plastic part
Labor time: 130 TU
Important Notice: Technical Bulletins issued by Porsche Cars North America, Inc. are intended only for use by professional automotive technicians who have attended Porsche service training
courses. They are written to inform those technicians of conditions that may occur on some Porsche vehicles, or to provide information that could assist in the proper servicing of a vehicle. Porsche special
tools may be necessary in order to perform certain operations identified in these bulletins. Use of tools and procedures other than those Porsche recommends in these bulletins may be detrimental to the
safe operation of your vehicle, and may endanger the people working on it. Properly trained Porsche technicians have the equipment, tools, safety instructions, and know-how to do the job properly and
safely. Part numbers listed in these bulletins are for reference only. The work procedures updated electronically in the Porsche PIWIS diagnostic and testing device take precedence and, in the event of a
discrepancy, the work procedures in the PIWIS Tester are the ones that must be followed.
© 2023 Porsche Cars North America, Inc.
Nov 15, 2023
Page 48 of 48
Tequipment