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NHTSA ID Number: 11027274

Manufacturer Communication Number: No 11-24

TSB/Document Date: 2026-01-07


Summary

Installation and conversion instructions for the 911 (992) GT3 RS Manthey Racing Kit. Please refer to PDF for additional information.


visual representation.

1.1

Disconnect the battery.

1.2

Remove and install wheels with central bolt. ⇒ Workshop Manual 'Remove and install wheel
with central bolt'.

1.3

Remove front apron ⇒ Workshop Manual 'Remove and install front apron'.

1.4

Remove front central air guide.

1.5

Remove seats ⇒ Workshop Manual 'Remove and install front seat (sports bucket seat)'.

1.6

Remove roll-over bar. ⇒ Workshop Manual 'Remove and install roll-over bar'.

1.7

Remove rear side trim panel. ⇒ Workshop Manual 'Remove and install rear side trim panel'.

1.8

Remove rear cover ⇒ Workshop Manual 'Remove and install rear cover'.

1.9

Remove rear window ⇒ Workshop Manual 'Remove and install rear window'.

1.10

Place carbon rear window plate on a mounting bracket and pre-install shark fin.

Shark fin seal (image should ONLY show the position of the seal)

Dec 17, 2025
Page 6 of 61

Tequipment

Installation and Conversion Instructions
1.

2.
3.

2

911 (992)
11 / 24 ENU

0913

0

– If necessary, the seal must be stretched slightly in length before installation. For easier
alignment of the shark fin, it is also recommended to moisten the washer and the seal
with window cleaner beforehand. Align/installshark fin seal so that the drainage bore
⇒ Shark fin seal (image should ONLY show the position of the seal) is located at the
bottom of the shark fin.

Shark fin attachment
Þ Shark fin
– Fit shark fin, ensuring that outer gasket is in the correct position and ⇒
attachment -1- lightly attach it with screws including wall flange (4x) so that the shark
fin can still be moved from outside.
– Proceed with carbon rear window plate as per PorscheeBay logo specifications like with a
"normal" rear window.

1.11

Remove door entry guard. ⇒ Workshop Manual 'Remove and install door entry guard'.

1.12

Remove rear diffuser ⇒ Workshop Manual 'Remove and install lower part of rear spoiler
(diffuser)'.

1.13

Remove front spring strut ⇒ Workshop Manual 'Remove and install front spring strut'.

1.14

Remove rear spring strut ⇒ Workshop Manual 'Remove and install rear spring strut'.

Chassis assembly
Information

Vehicles for which new dampers had to be ordered due to a change to the lift unit thread (from
03/2025), please disassemble the lift unit from the ordered dampers and mount it on the kit
dampers as continuously described.

Tequipment

Dec 17, 2025
Page 7 of 61

0

911 (992)
0913

ENU

Installation and Conversion Instructions

11/24

For this work step, work steps 1.12 and 1.11 MUST be completed. The NON-lift variant is already
delivered assembled and installation can be started straightaway. The lift variant must be converted
as described in the following work steps.
Torque shock absorbers
Location

Torque

Nut on piston rod

40 Nm (29.50 ftlb.)

Grub screw on spring plate

1 Nm (0.74 ftlb.)

Mounting ring on bellows

15 Nm (11.06 ftlb.)

Lift system lock nut

66 Nm (48.7 ftlb.)

Front brake line screw connection

10 Nm (7.4 ftlb.)

Rear brake line screw connection

10 Nm (7.4 ftlb.)

2.1

Disassemble front spring strut
2.1.1

Disassemble spring strut. ⇒ Workshop Manual '408537 Disassemble and assemble
front spring strut'

2.1.2

Remove front axle lift
Only for vehicles with front axle lift system.
The tool for the lock nut supplied with the kit must be used! The general height of
the lift unit is indicated by dimension X; however, during installation, the unit should
be aligned such that the lift connection is aligned with the valve block.
Important: It must be ensured that the spring ends of the main spring and helper
spring do not lie directly on top of each other. This can lead to excessive voltages in
the spring plate, which can lead to cracks or breaks. The springs must be rotated so
that the ends do not lie directly on top of each other.

Dec 17, 2025
Page 8 of 61

2.1.3

Þ Front axle spring strut with lift -2- and lock nut ⇒
Þ
Remove height-adjusting nut ⇒
Front axle spring strut with lift -3-.

2.1.4

Þ Front axle spring strut with lift -4- up until the dust boot
Screw the front axle lift
Þ Front axle spring strut with lift -1- and remove dust boot ⇒
Þ Front axle
detaches ⇒
spring strut with lift -1-.

Tequipment

Installation and Conversion Instructions
2.1.5

11 / 24 ENU

0913

0

Þ Front axle
Remove front axle lift ⇒
spring strut with lift -4- and lock nut
Þ Front axle spring strut with lift

Þ Front
-5- from the spring strut ⇒
axle spring strut with lift -6- (use
open-ended spanner 700 17 171
and open-ended spanner 700 17
184).
1
2
3
4
5
6

2.2

911 (992)






Dust boot
Height-adjusting nut
Lock nut
Front axle lift system
Lock nut
Spring strut

Front axle spring strut with lift

Assemble new front spring strut with front axle lift
2.2.1

Þ Front axle spring strut with lift overview -16- and lift system ⇒
Þ
Mount lock nut ⇒
Front axle spring strut with lift overview -12- on the spring strut.
Do not tighten to the specified torque yet.

2.2.2

Þ Front axle spring strut with lift overview -15- on the shock absorber
Fit plastic cap ⇒
housing (use impact sleeve 700 17 169 and a plastic hammer).

2.2.3

For lift variants, attach ventilation discs to piston rods (2 units per side) ⇒ Piston rod
ventilation discs.

Piston rod ventilation discs
2.2.4

Þ Front axle spring strut with lift overview -9- screwed ⇒
Þ
New spring support can be ⇒
Front axle spring strut with lift overview -16- onto the lift unit.

2.2.5

Bellows assembly:

Tequipment

Dec 17, 2025
Page 9 of 61

0

911 (992)
0913

ENU

11/24

Installation and Conversion Instructions
Assembly of bellows mounting ring: Secure lift unit against turning by fully screwing
Þ Front axle spring strut with lift overview -9- and securing
down lower spring plate ⇒
with grub screw. Tightening torque 1 Nm (0.7 ftlb.)
Þ Front axle spring strut with lift overview -4.1Tighten mounting ring for bellows ⇒
Þ Front axle spring
(use hook spanner 685 11 296), countering at lower spring plate ⇒
strut with lift overview -9- (use hook spanner 685 11 295). Tightening torque 15 Nm
(11.1 ftlb.)

Þ Front axle spring strut with lift overview -4- to the
Fit the short end of the bellows ⇒
Þ Front axle spring strut with lift overview -4.1-. Push coil spring ⇒
Þ
mounting ring ⇒
Þ Front axle spring strut
Front axle spring strut with lift overview -8-, spacer ring, ⇒
Þ Front axle spring strut with lift overview
with lift overview -7- and auxiliary spring ⇒
Þ Front axle spring strut with lift
-6- onto the piston rod. Fit upper spring support ⇒
Þ Front axle spring strut with lift overview -4-. Fit
overview -4.2- onto bellows ⇒
Þ Front axle spring strut with lift overview -3-, top bellows ring ⇒
Þ Front
rubber stop ⇒
Þ Front axle spring
axle spring strut with lift overview -5- (Bellows is fixed between ⇒
Þ Front axle spring strut with lift overview -5-) and
strut with lift overview -4.2- and ⇒
Þ
supporting mount ⇒ Front axle spring strut with lift overview -2- on the piston rod
Þ Front axle spring strut with lift overview -1- (use special tool KW
and tighten nut ⇒
685 10 179).
Tightening torque 40 Nm (29.5 ftlb.) + Loctite 243.

Þ Front axle spring strut with lift overview -3- are fitted
Ensure that the rubber stops ⇒
correctly: Pointed end must point upwards as shown.
Þ Front axle spring strut with lift overview -4- is clipped onto the plastic
The bellows ⇒
cap when the spring strut is completely fitted.

Dec 17, 2025
Page 10 of 61

Tequipment

Installation and Conversion Instructions

911 (992)
11 / 24 ENU

0913

0

Overview of spring strut lift variant

1
2
3
4




Front axle spring strut with lift overview
Nut
Support bearing - 19A.491.13 (LH)/19A.491.14 (RH)
Rubber stop
Bellows

Tequipment

Dec 17, 2025
Page 11 of 61

0

911 (992)
0913

ENU

Installation and Conversion Instructions

11/24
4.1
4.2
5
6
7
8
9
10
12
15
16
17












Mounting ring on bellows
Upper spring plate
Upper ring on bellows
Auxiliary spring
Intermediate ring
Coil spring
Lower spring plate (install with a distance of 11 mm from the lift system)
Ventilation discs 2x
Spring strut
Plastic cap
Lift unit
Nut

Front axle lift

DO NOT lift front axle

Rear axle

2.3

Right

992.044.857.21

992.044.857.22

Left

Right

992.044.857.31

992.044.857.32

Left

Right

992.044.857.23

992.044.857.24

Adjust the relevant dimension X.
On vehicles with a lift system, ensure that the lift system line is aligned with the center of the
damping force adjustment wheel (A).

1.

Dec 17, 2025
Page 12 of 61

Left

Front axle spring strut and rear axle adjustment values (illustration of spring strut may differ)
– Front axle spring strut with lift

Tequipment

911 (992)

Installation and Conversion Instructions
2.
3.

11 / 24 ENU

0913

0

– Front axle spring strut without lift
– Rear-axle spring strut

Front axle with front axle lift

Dimension A

Lower edge of spring seat to shoulder of lift unit

11 mm

Front axle with front axle lift

Dimension X

Lower edge of lift unit lock nut to shoulder of shock
absorber-valve foot

84 mm

Front axle without front axle lift

Dimension X

Lower edge of spring seat to shoulder of
damper-valve foot

103 mm

Rear axle

Dimension X

Lower edge of spring seat to shoulder of
damper-valve foot

72 mm

2.4

Tighten spring plate grub screws.
Tightening torque 1 Nm (0.7 ftlb.)

2.5

Only for spring strut with lift system: Tighten lift system lock nut (use open-ended spanner 700
17 171 and open-ended spanner 700 17 184).
Tightening torque 66 Nm (48.7 ftlb.)

2.6

Replace rear spring strut

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TSB/Document ID: No 11-24

Replacement Service Bulletin Number:

MFR Communication Date: 2025-12-17

MFR Internal Campaign ID/Software Version:

Communication Type: Service Bulletin/Repair Instructions

NHTSA Components: UNKNOWN OR OTHER

MFR Component System:

MFR Component Subsystem:


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