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Shock absorber additional spring. Porsche 987 Boxster / 987C Cayman / 718 Cayman / 718 Boxster ❭ 98733330100
- Porsche Boxster 987 2.7L 2005-08/08
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche Boxster 718 2.0L Manual (300 Bhp) 2017>>
- Porsche Boxster 718 2.0L PDK (300 Bhp) 2017>>
- Porsche Boxster S 718 2.5L Manual (350 Bhp) 05/2017>>
- Porsche Boxster S 718 2.5L PDK (350 Bhp) 05/2017>>
- Porsche Boxster T 718 2.0L Manual (300 Bhp) 01/2019>>
- Porsche Boxster T 718 2.0L PDK (300 Bhp) 01/2019>>
- Porsche Boxster GTS 718 2.5L Manual (365 Bhp) 05/2017>>
- Porsche Boxster GTS 718 2.5L PDK (365 Bhp) 05/2017>>
- Porsche Boxster GTS 718 4.0L Manual (400 Bhp) 01/2019>>
- Porsche Boxster GTS 718 4.0L PDK (400 Bhp) 01/2019>>
- Porsche Boxster 25 Years 718 4.0L Manual (400 Bhp) 01/2020>>
- Porsche Boxster 25 Years 718 4.0L PDK (400 Bhp) 01/2020>>
- Porsche Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
- Porsche Cayman 718 2.0L Manual (300 Bhp)
- Porsche Cayman 718 2.0L PDK (300 Bhp)
- Porsche Cayman S 718 2.5L Manual (350 Bhp)
- Porsche Cayman S 718 2.5L PDK (350 Bhp)
- Porsche Cayman T 718 2.0L Manual (300 Bhp)
- Porsche Cayman T 718 2.0L PDK (300 Bhp)
- Porsche Cayman GTS 718 2.5L Manual (365 Bhp)
- Porsche Cayman GTS 718 2.5L PDK (365 Bhp)
- Porsche Cayman GTS 718 4.0L PDK (400 Bhp)
The replacement helper spring / bump stop assembly for the rear shock absorber on Porsche 987 Boxster and Cayman vehicles. This bump stop is designed to sit atop or within the rear shock/strut assembly, supporting the suspension’s load under compression, preventing harsh bottoming, and helping maintain ride height and handling balance. Manufactured to match Porsche’s original specification in terms of dimensions and elasticity.

Porsche 987 Boxster 2006 - 2008
Porsche 987 MKII Boxster 2009 - 2012
Porsche 987C Cayman 2005 - 2008
Porsche 987C MKII Cayman 2009 - 2012
Porsche 718C (982C) Cayman 2017>>
Porsche 718 (982) Boxster 2017>>
Diagram ref no 8
• Position on Vehicle: Rear suspension, installed within or adjacent to the shock absorber/strut assembly on the rear axle - acts as secondary support (helper spring) or as bump stop to cushion full compression of the suspension.
• Applications: Ideal when your rear suspension exhibits signs of bottoming, excessive squat under load, or the helper-spring/bump stop is missing, fatigued or deformed - improving ride quality, maintaining correct ride height, and preserving handling performance.
The helper spring / bump stop is a critical yet often overlooked component of the rear suspension system. It steps in under heavier loads, sharp compressions or lowered ride-height scenarios to prevent suspension harsh-bottoming, maintain ride height and preserve handling geometry. When the part is worn or missing, you may experience a harsh “clunk” on full compression, inconsistent ride height, rear suspension instability or accelerated wear of other suspension components. Replacing it restores correct support, prolongs suspension life and ensures your car handles the way it was engineered.
When and why to replace:
• Rear suspension bottoms out prematurely under moderate load or when cornering.
• Noticeable change in ride height, rear sagging or uneven posture under load.
• After replacement of rear shock absorbers or other suspension components where the helper spring/bump stop may have been removed or reused.
• High-mileage vehicle where the original component may have degraded or compressed with age.
• If you have lowered or modified your suspension and want to ensure secondary support matches the rest of the system.
Related reference numbers
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98733330100
The product you are viewing cross references to these numbers
- Porsche 991.1 Carrera C2 3.4L (350 Bhp) 2012-16
- Porsche 991.1 Carrera C2S / GTS 3.8L (400/430 Bhp) 2012-16
- Porsche 991.1 Carrera C4 3.4L (350 Bhp) 2012-16
- Porsche 991.1 Carrera C4S / GTS 3.8L (400/430 Bhp) 2012-16
- Porsche 991.2 Carrera 2 3.0L (370 Bhp) 2016-19
- Porsche 991.2 Carrera 2S / GTS 3.0L (420/450 Bhp) 2016-19
- Porsche 991.2 Carrera 4 3.0L (370 Bhp) 2016-19
- Porsche 991.2 Carrera 4S / GTS 3.0L (420/450 Bhp) 2016-19
- Porsche 991.2 Cabriolet 2 3.0L (370 Bhp) 2016-19
- Porsche 991.2 Cabriolet 2S / GTS 3.0L (420/450 Bhp) 2016-19
- Porsche 991.2 Cabriolet 4 3.0L (370 Bhp) 2016-19
- Porsche 991.2 Cabriolet 4S / GTS 3.0L (420/450 Bhp) 2016-19
- Porsche 991.2 Targa 4 3.0L (370 Bhp) 2016-19
- Porsche 991.2 Targa 4S / GTS 3.0L (420/450 Bhp) 2016-19
- Porsche 992.1 Carrera 2 3.0L 2019-24
- Porsche 992.1 Carrera 4 3.0L 2019-24
- Porsche 992.1 Carrera 2 Cabriolet 3.0L 2019-24
- Porsche 992.1 Carrera 4 Cabriolet 3.0L 2019-24
- Porsche 992.1 Carrera 2S / GTS 3.0L 2019-24
- Porsche 992.1 Carrera 4S / GTS 3.0L 2019-24
- Porsche 992.1 Carrera 2S / GTS Cabriolet 3.0L 2019-24
- Porsche 992.1 Carrera 4S / GTS Cabriolet 3.0L 2019-24
- Porsche 992.1 Targa 4 3.0L 2020-24
- Porsche 992.1 Targa 4S / GTS 3.0L 2020-24
- Porsche 992.1 Speedster 4.0L 2019-24
- Porsche 992.1 Turbo 3.8L 2020-24
- Porsche 992.1 Turbo S 3.8L 2020-24
- Porsche 992.1 Turbo Cabriolet 3.8L 2020-24
- Porsche 992.1 Turbo S Cabriolet 3.8L 2020-24
- Porsche 992.1 (911) Dakar 3.0L 2023-24
- Porsche 992.2 Carrera 2 3.0L 2024>>
- Porsche 992.2 Carrera 2 GTS 3.6L 2024>>
- Porsche 992.2 Carrera 4 GTS 3.6L 2024>>
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- Porsche 992.2 Targa 4 GTS 3.6L 2024>>
- Porsche 992.2 Turbo 3.6L 2024>>

Fits:
Porsche 991.1 Carrera 2012-16
* option code: 030 - Sport suspension
* option code: 031 - Sport chassis with PASM and PDCC
* option code: 352 - Electronic damper control for PASM and PDCC
* option code: 475 - PASM electronic damper control
Porsche 991.2 Carrera 2017-19
* option code: 030 - Sport suspension
* option code: 031 - Sport chassis with PASM and PDCC
Porsche 992.1 Carrera 2019 - 2024
Porsche 992.2 Turbo 2020 - 2024
with option code: 1BV - Sports Suspension/shock absorption,
Porsche 992.2 Carrera 2024>>
Porsche 992.2 Turbo 2024>>
with option code: 1BV - Sports Suspension/shock absorption,
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9P1512137A
The product you are viewing cross references to these numbers
- Porsche 992.1 (911) Dakar 3.0L 2023-24
- Porsche 992.2 Carrera 2 3.0L 2024>>
- Porsche 992.2 Carrera 2 GTS 3.6L 2024>>
- Porsche 992.2 Carrera 4 GTS 3.6L 2024>>
- Porsche 992.2 Carrera 2 3.0L Cabriolet 2024>>
- Porsche 992.2 Carrera 2 GTS 3.6L Cabriolet 2024>>
- Porsche 992.2 Carrera 4 GTS 3.6L Cabriolet 2024>>
- Porsche 992.2 Targa 4 GTS 3.6L 2024>>
- Porsche 992.2 Turbo 3.6L 2024>>
Fits:
- Porsche 992.1 (911) Dakar 3.0L 2023-24 *
* 1BM - Standard suspension/shock absorption
* 2UM - Chassis with increased ride height 2
- Porsche 992.2 Carrera 2 3.0L 2024>>
- Porsche 992.2 Carrera 2 GTS 3.6L 2024>>
- Porsche 992.2 Carrera 4 GTS 3.6L 2024>>
- Porsche 992.2 Carrera 2 3.0L Cabriolet 2024>>
- Porsche 992.2 Carrera 2 GTS 3.6L Cabriolet 2024>>
- Porsche 992.2 Carrera 4 GTS 3.6L Cabriolet 2024>>
- Porsche 992.2 Targa 4 GTS 3.6L 2024>>
- Porsche 992.2 Turbo 3.6L 2024>>
- Porsche 992.1 Carrera 2 3.0L 2019-24
- Porsche 992.1 Carrera 4 3.0L 2019-24
- Porsche 992.1 Carrera 2 Cabriolet 3.0L 2019-24
- Porsche 992.1 Carrera 4 Cabriolet 3.0L 2019-24
- Porsche 992.1 Carrera 2S / GTS 3.0L 2019-24
- Porsche 992.1 Carrera 4S / GTS 3.0L 2019-24
- Porsche 992.1 Carrera 2S / GTS Cabriolet 3.0L 2019-24
- Porsche 992.1 Carrera 4S / GTS Cabriolet 3.0L 2019-24
- Porsche 992.1 Targa 4 3.0L 2020-24
- Porsche 992.1 Targa 4S / GTS 3.0L 2020-24
- Porsche 992.1 Turbo 3.8L 2020-24
- Porsche 992.1 Turbo S 3.8L 2020-24
- Porsche 992.1 Turbo Cabriolet 3.8L 2020-24
- Porsche 992.1 Turbo S Cabriolet 3.8L 2020-24
- Porsche 992.1 (911) Dakar 3.0L 2023-24
- Porsche 992.2 Carrera 2 3.0L 2024>>
- Porsche 992.2 Carrera 2 GTS 3.6L 2024>>
- Porsche 992.2 Carrera 4 GTS 3.6L 2024>>
- Porsche 992.2 Carrera 2 3.0L Cabriolet 2024>>
- Porsche 992.2 Carrera 2 GTS 3.6L Cabriolet 2024>>
- Porsche 992.2 Carrera 4 GTS 3.6L Cabriolet 2024>>
- Porsche 992.2 Targa 4 GTS 3.6L 2024>>
- Porsche 992.2 Turbo 3.6L 2024>>
Fits:
Porsche 992 Carrera 2019 - 2024
*For vehicles with PASM
Porsche 992 (911) Dakar 2020 - 2024
* For vehicles with adaptive suspension
* 1BM - Standard suspension/shock absorption
* 2UM - Chassis with increased ride height 2
Porsche 992 Turbo 2020 - 2024
* For vehicles with Standard suspension
* For vehicles with PASM
Porsche 992.2 Carrera 2 3.0L 2024>>
Porsche 992.2 Carrera 2 GTS 3.6L 2024>>
Porsche 992.2 Carrera 4 GTS 3.6L 2024>>
Porsche 992.2 Carrera 2 3.0L Cabriolet 2024>>
Porsche 992.2 Carrera 2 GTS 3.6L Cabriolet 2024>>
Porsche 992.2 Carrera 4 GTS 3.6L Cabriolet 2024>>
Porsche 992.2 Targa 4 GTS 3.6L 2024>>
Porsche 992.2 Turbo 3.6L 2024>>
Diagram ref no 12
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992512353A
The product you are viewing cross references to these numbers
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