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- Porsche 914 (1970-1976)
This is installed on the Shock after inserting the top through the Pot for Shock Absorber (Shock Tower).
Restore secure rear shock absorber mounting and controlled suspension performance with this OE Match Upper Shock Absorber Mounting Bush, designed for compatible Porsche rear axle applications.
Fits:
- Porsche 914 1970-76
The upper shock absorber mounting bush forms the resilient connection between the rear shock absorber and its upper mounting point. It helps locate the damper securely while absorbing vibration, impact and small movements generated as the suspension operates.
During normal driving, the rear shock absorbers continuously compress and extend as the wheels respond to bumps, road imperfections, acceleration, braking and cornering. These forces are transmitted through the mounting bushes, making their condition important for both suspension performance and refinement.
Over time, the rubber can harden, crack, compress, distort or separate from its associated metal components. A deteriorated upper mounting bush can allow unwanted shock absorber movement, resulting in knocking noises, increased vibration and less precise suspension operation.
Replacing a worn bush with this OE Match Upper Rear Shock Absorber Mounting Bush 91433351401/1 helps restore a secure damper connection and supports predictable rear suspension behaviour.
Diagram Ref No 12
What This Product Does:
- Secures the upper section of the rear shock absorber.
- Provides a resilient connection between the damper and chassis.
- Helps locate the shock absorber correctly.
- Allows the designed degree of movement at the mounting point.
- Absorbs vibration and suspension impacts.
- Helps isolate road noise from the vehicle body.
- Reduces the possibility of metal-to-metal contact.
- Controls unwanted movement around the upper damper mounting.
- Supports consistent shock absorber operation.
- Helps maintain rear suspension refinement.
- Helps reduce knocking and rattling caused by worn mounting components.
- Replaces a cracked, compressed, distorted or deteriorated bush.
- Provides an OE Match replacement for compatible Porsche applications.
Symptoms Of Wear Or Failure:
- Knocking from the rear suspension.
- Clunking when travelling over bumps.
- Rattling around the upper shock absorber mounting.
- Increased suspension noise.
- Creaking from the rear suspension.
- Excessive shock absorber movement.
- Increased vibration transmitted into the body.
- Rear suspension feeling less controlled.
- Reduced ride refinement.
- Visible cracking in the rubber.
- Hardened or brittle rubber.
- Bush visibly compressed or distorted.
- Rubber separating from its metal components.
- Excessive play around the upper shock mounting.
- Damaged or displaced mounting bush.
- Shock absorber no longer sitting securely within its mounting.
Why Replacement Matters:
- The shock absorber needs secure mounting points to control suspension movement effectively.
- If the upper mounting bush deteriorates, the damper may move within its mounting before it can properly react to suspension movement.
- Replacing a worn Upper Rear Shock Absorber Bush helps restore the intended connection between the damper and vehicle structure.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91433351401
The product you are viewing cross references to these numbers
- Porsche Boxster 987 2.7L 2005-08/08
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
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- Porsche Cayman 2.7L 987C 2006-08
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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
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- Porsche Cayman 2.7L 981 2013-16
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- Porsche Cayman GT4 3.8L 2015-16
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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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