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- Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster 986 2.7L 2003-04
- Porsche Boxster S 986 3.2L 2003-04
- Porsche Boxster 987 2.7L 2005-08/08
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche Boxster 987 MKII 2.9L 2009-12
- Porsche Boxster S 987 MKII 3.4L 2009-12
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MKII Carrera C2 3.6L 2009-12
- Porsche 997 MKII Carrera C2S 3.8L 2009-12
- Porsche Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
- Porsche Cayman 2.9L 987C MKII 2009-12
- Porsche Cayman S / R 3.4L 987C MKII 2009-12
Shock Absorber Supporting mount complete with Front bearing 99634351505.
SET OF 2
Porsche 986 Boxster 1997-04
Porsche 987 Boxster MKI & MKII 2005>>
Porsche 987C Cayman MKI & MKII 2005>>
Porsche 996 C2 1998-05 (without sport suspension)
Porsche 997 MKI C2 / C2S 2005-08
Porsche 997 MKII C2 / C2S 2009-12
Diagram ref no 3
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99734301801
The product you are viewing cross references to these numbers
This kit is comprised of the following items:
- Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster 986 2.7L 2003-04
- Porsche Boxster S 986 3.2L 2003-04
- Porsche Boxster 987 2.7L 2005-08/08
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche Boxster 987 MKII 2.9L 2009-12
- Porsche Boxster S 987 MKII 3.4L 2009-12
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 996 TURBO 2000-05
- Porsche Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
- Porsche Cayman 2.9L 987C MKII 2009-12
- Porsche Cayman S / R 3.4L 987C MKII 2009-12
Shock Absorber Additional Spring - Front
Sold each - 2 required per car
Maintain the performance, comfort and protection of your
Porsche suspension system with this OE Match Shock Absorber Additional Spring. Commonly referred to as a bump stop or auxiliary spring, this
component is fitted to the shock absorber assembly and plays an important role
in controlling suspension movement during extreme compression.
Fits:
- Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster 986 2.7L 2003-04
- Porsche Boxster S 986 3.2L 2003-04
- Porsche Boxster 987 2.7L 2005-08/08
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche Boxster 987 MKII 2.9L 2009-12
- Porsche Boxster S 987 MKII 3.4L 2009-12
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 996 TURBO 2000-05
- Porsche Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
- Porsche Cayman 2.9L 987C MKII 2009-12
- Porsche Cayman S / R 3.4L 987C MKII 2009-12
Diagram ref no 9
Designed for use on Porsche 986 Boxster, 987 Boxster and Cayman, and 996 Carrera models, the additional spring helps absorb impacts when the suspension approaches the end of its travel. This protects the shock absorber, suspension components and chassis from excessive loads while maintaining ride quality and vehicle control.
Over time, the additional spring can deteriorate due to age, compression cycles, road contamination and exposure to heat and moisture. Replacing worn bump stops is an important part of any suspension overhaul and helps restore factory suspension performance.
What Does the Shock Absorber Additional Spring Do?
The additional spring acts as a progressive cushion during suspension compression.
Its primary functions include:
- Absorbing extreme suspension loads
- Preventing metal-to-metal contact
- Protecting shock absorbers
- Protecting suspension components
- Improving ride comfort
- Maintaining suspension control
- Supporting chassis protection
- Reducing impact harshness
It forms an important part of the suspension system, especially during hard cornering, heavy braking or driving over uneven road surfaces.
Why Do Additional Springs Fail?
Additional springs are constantly subjected to compression, environmental exposure and ageing.
Common causes of failure include:
- Age-related foam deterioration
- Repeated compression cycles
- Road dirt contamination
- Water ingress
- Heat exposure
- UV degradation
- Physical damage during suspension servicing
- General wear and tear
Over time the material can crack, crumble, compress permanently or disintegrate completely.
Symptoms of a Worn Additional Spring
Common signs of failure include:
- Visible cracking or splitting
- Missing sections of foam material
- Deteriorated or crumbling bump stops
- Increased suspension harshness
- Knocking noises over bumps
- Reduced ride quality
- Suspension bottoming out
- Uneven suspension behaviour
Many worn bump stops are only discovered during shock absorber replacement or suspension inspections.
When Should the Additional Spring Be Replaced?
Replacement is recommended when:
- Installing new shock absorbers
- Carrying out suspension refurbishment
- The spring shows visible deterioration
- Suspension noises are present
- Ride quality has deteriorated
- The vehicle has covered high mileage
- Performing preventative maintenance
- Completing a Porsche restoration project
Most suspension specialists recommend replacing bump stops whenever dampers are renewed.
Why Replacement Matters
A worn or damaged additional spring can reduce suspension protection and negatively affect ride quality.
Benefits of replacement include:
- Improved suspension performance
- Better ride comfort
- Enhanced shock absorber protection
- Reduced suspension noise
- Improved vehicle control
- Prevention of suspension damage
- Restoration of factory ride characteristics
- Improved long-term reliability
Replacing this inexpensive component during suspension maintenance can significantly improve overall suspension performance.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99634330102
The product you are viewing cross references to these numbers
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster 986 2.7L 2003-04
- Porsche Boxster S 986 3.2L 2003-04
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 996 TURBO 2000-05
- Porsche 996 GT2 2001-05
Maintain the correct operation of your Porsche's front suspension with this OE Match Front Shock Absorber Stop Disk, manufactured as a direct replacement. Produced to OE-style specifications, this stop disk is designed to fit the front shock absorber assembly, providing essential support for the suspension components while helping to protect the damper during full suspension compression.
Fits:
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster 986 2.7L 2003-04
- Porsche Boxster S 986 3.2L 2003-04
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 996 TURBO 2000-05
- Porsche 996 GT2 2001-05
Diagram Ref No 6
The shock absorber stop disk works alongside the bump stop and suspension mount to control suspension travel and distribute loads through the strut assembly. Over time, it can become cracked, distorted, worn, or damaged due to repeated impacts, age, or suspension wear. Replacing the stop disk during suspension servicing or shock absorber replacement helps maintain correct suspension function and prolongs the life of associated components. This OE Match component is ideal for routine maintenance, suspension overhauls, repairs, and Porsche restoration projects.
What This Product Does:
- Supports the front shock absorber and bump stop assembly.
- Helps control suspension travel during compression.
- Distributes impact loads through the suspension assembly.
- Protects the shock absorber from excessive loading.
- Replaces worn, cracked, or damaged original stop disks.
- Supports smooth and reliable suspension operation.
- Provides an OE-style fit and dependable quality.
Symptoms Of Wear Or Failure:
- Cracked or broken stop disk.
- Distorted or deformed suspension components.
- Excessive suspension noise over bumps.
- Premature wear of the bump stop.
- Poor suspension damping performance.
- Visible damage during suspension servicing.
- Excessive suspension travel.
- Age-related deterioration of the original component.
Why Replacement Matters:
- The front shock absorber stop disk is an important part of the suspension assembly, helping to support the bump stop and distribute impact forces during suspension movement. A worn or damaged stop disk can reduce suspension protection, accelerate wear of surrounding components, and contribute to unwanted suspension noise or reduced ride quality.
- Replacing the stop disk restores the correct operation of the suspension assembly, protects the shock absorber from excessive impact loads, and helps maintain ride comfort and handling performance. Manufactured as a direct replacement and produced to OE-style specifications, this OE Match stop disk provides the correct fit, dependable quality, and long-lasting durability, making it an excellent choice for Porsche maintenance, suspension repairs, and restoration projects.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99634310703
The product you are viewing cross references to these numbers
- Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster 986 2.7L 2003-04
- Porsche Boxster S 986 3.2L 2003-04
- Porsche Boxster 987 2.7L 2005-08/08
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche Boxster 987 MKII 2.9L 2009-12
- Porsche Boxster S 987 MKII 3.4L 2009-12
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MKII Carrera C2 3.6L 2009-12
- Porsche 997 MKII Carrera C2S 3.8L 2009-12
- Porsche Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
- Porsche Cayman 2.9L 987C MKII 2009-12
- Porsche Cayman S / R 3.4L 987C MKII 2009-12
Shock Absorber Groove Ball Bearing
Sold each - 2 required per car
Restore smooth and precise suspension operation with this OE
Match Shock Absorber Groove Ball Bearing. The groove ball bearing forms part of the shock absorber and
strut mounting assembly, allowing suspension components to move and rotate
smoothly while supporting the loads transmitted through the suspension.
Fits:
- Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster 986 2.7L 2003-04
- Porsche Boxster S 986 3.2L 2003-04
- Porsche Boxster 987 2.7L 2005-08/08
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche Boxster 987 MKII 2.9L 2009-12
- Porsche Boxster S 987 MKII 3.4L 2009-12
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MKII Carrera C2 3.6L 2009-12
- Porsche 997 MKII Carrera C2S 3.8L 2009-12
- Porsche Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
- Porsche Cayman 2.9L 987C MKII 2009-12
- Porsche Cayman S / R 3.4L 987C MKII 2009-12
Diagram ref no 11
As these bearings age, wear or contamination can lead to increased friction, noise and rough operation. Replacing worn bearings during suspension maintenance can help restore smooth movement and eliminate unwanted play or noises from the strut assembly.
What Does a Shock Absorber Groove Ball Bearing Do?
The groove ball bearing allows controlled, low-friction movement within the suspension and shock absorber mounting assembly.
On the front suspension, smooth bearing movement is particularly important as the strut assembly responds to both suspension travel and steering inputs.
A correctly functioning bearing helps provide:
- Smooth suspension movement
- Reduced friction within the strut assembly
- Consistent steering movement
- Correct operation of associated suspension components
- Reduced unwanted noise and resistance
Why Do Shock Absorber Bearings Fail?
Suspension bearings operate under continuous load and are exposed to vibration, impacts and changing road conditions. Over time, this can cause the bearing surfaces to deteriorate.
Common causes of failure include:
- Normal age and mileage
- Water and moisture contamination
- Dirt and road debris
- Corrosion
- Repeated suspension impacts
- Deterioration of bearing lubrication
- Wear from prolonged suspension movement
Once worn, the bearing may no longer rotate smoothly and can develop play, stiffness or noise.
When Should the Bearing Be Replaced?
Replacement should be considered if:
- Knocking or clicking noises are present
- Steering movement feels rough or notchy
- Creaking or grinding is heard from the suspension
- Excessive play is found in the bearing
- The bearing is seized or difficult to rotate
- Corrosion or physical damage is visible
- Shock absorbers or upper suspension mounts are being replaced
Because access often requires dismantling part of the strut assembly, replacing worn bearings while fitting new shock absorbers or suspension mounts can help avoid duplicated labour later.
Porsche 996 / 997 / Boxster 986 / 987 / Cayman 987C Suspension Bearings
Shock absorber bearings are an important but often overlooked part of the Porsche suspension system. While shock absorbers and springs control suspension movement, bearings and mounts allow the assembly to operate smoothly without excessive friction or unwanted movement.
Age, mileage and exposure to road conditions can gradually deteriorate these components. When carrying out a suspension overhaul on a Porsche 996, 997, Boxster 986, Boxster 987 or Cayman 987C, inspecting the associated bearings, top mounts, bump stops and protective components can help identify wear before the suspension is reassembled.
Replacing worn components together can restore a tighter, quieter and more precise suspension system.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99634351505
The product you are viewing cross references to these numbers