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Shock absorber supporting top mount rear. Porsche 997.1 C2 / C4 2005-08 Cabrio - 99733306103
99733306103/1
Vehicle Group
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 4 3.6L 2005-08
Information
Shock absorber supporting top mount REAR
This OE Match rear shock absorber supporting top mount is a direct replacement for the original Porsche component fitted to 997-generation 911 models equipped with standard suspension/chassis option I029. Installed at the upper mounting point of the rear suspension strut assembly, it secures the shock absorber to the vehicle body while providing controlled flexibility and vibration damping. This is suitable for both left and right rear applications and is commonly replaced during rear shock absorber servicing or suspension overhaul work.
Typically 2 required per vehicle, sold individually.
Fits:
For Cars with Standard Chassis (I029)
Porsche 997 C2 / C4 MKI 2005 - 2008 CABRIO
Diagram ref no 2
The rear top mount secures the upper section of the shock absorber assembly to the chassis while cushioning suspension movement. It helps absorb vibration and impacts from the road, contributing to ride comfort, stability, and proper suspension performance.
Function
• Secures rear shock absorber to vehicle chassis
• Absorbs vibration and road impacts
• Maintains proper suspension alignment and geometry
• Reduces suspension noise and harshness
• Supports smooth and controlled suspension movement
Over time, the rubber isolator inside the top mount can deteriorate due to age, suspension load, and road conditions. Worn mounts may cause knocking noises, excessive suspension movement, vibration, or reduced handling precision. Replacing worn top mounts restores suspension stability, improves ride comfort, and helps maintain proper shock absorber performance.
When to replace
• Knocking or clunking noises from rear suspension
• Excessive vibration or harsh ride quality
• Visible cracking or deterioration of rubber mount
• Uneven suspension movement or instability
• During rear shock absorber replacement or suspension overhaul
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99733306103
The product you are viewing cross references to these numbers
This OE Match rear shock absorber supporting top mount is a direct replacement for the original Porsche component fitted to 997-generation 911 models equipped with standard suspension/chassis option I029. Installed at the upper mounting point of the rear suspension strut assembly, it secures the shock absorber to the vehicle body while providing controlled flexibility and vibration damping. This is suitable for both left and right rear applications and is commonly replaced during rear shock absorber servicing or suspension overhaul work.
Typically 2 required per vehicle, sold individually.
Fits:
For Cars with Standard Chassis (I029)
Porsche 997 C2 / C4 MKI 2005 - 2008 CABRIO
Diagram ref no 2
The rear top mount secures the upper section of the shock absorber assembly to the chassis while cushioning suspension movement. It helps absorb vibration and impacts from the road, contributing to ride comfort, stability, and proper suspension performance.
Function
• Secures rear shock absorber to vehicle chassis
• Absorbs vibration and road impacts
• Maintains proper suspension alignment and geometry
• Reduces suspension noise and harshness
• Supports smooth and controlled suspension movement
Over time, the rubber isolator inside the top mount can deteriorate due to age, suspension load, and road conditions. Worn mounts may cause knocking noises, excessive suspension movement, vibration, or reduced handling precision. Replacing worn top mounts restores suspension stability, improves ride comfort, and helps maintain proper shock absorber performance.
When to replace
• Knocking or clunking noises from rear suspension
• Excessive vibration or harsh ride quality
• Visible cracking or deterioration of rubber mount
• Uneven suspension movement or instability
• During rear shock absorber replacement or suspension overhaul
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99733306103
99733306103
The product you are viewing cross references to these numbers
Price: £85.00
In stock
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Information
Shock absorber additional spring.
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
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Porsche 718C (982C) Cayman 2017>>
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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
Related, superseded, cross reference or alternative numbers for comparison.
98733330100
The product you are viewing cross references to these numbers
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.
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Information
Shock absorber top mount rear.
Sold each - 2 required per car
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
98133305901
The product you are viewing cross references to these numbers
Sold each - 2 required per car
Fits:
Porsche 981 Boxster / Cayman - 2012 to 2016
Porsche 718 Boxster / Cayman - 2017 onwards
Click 'Zoom in' for large parts diagram.
Diagram ref no 2
Related reference numbers
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98133305901
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Price: £50.00
In stock