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- 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 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MK1 Carrera 4 3.6L 2005-08
- Porsche 997 MK1 Carrera 4S 3.8L 2005-08
- Porsche 997 MKII Carrera C2 3.6L 2009-12
- Porsche 997 MKII Carrera C4 3.6L 2009-12
- Porsche 997 MKII Carrera C2S 3.8L 2009-12
- Porsche 997 MKII Carrera C4S 3.8L 2009-12
This is for the shock absorber as an additional spring, also known as a bump stop, stopper or helper spring, designed for the front strut assemblies on Porsche 997 models equipped with the Sport chassis (option codes I030 or I480). Front axle suspension assembly for Porsche 996/997 (1998–2012), serving as a rubber stop or bushing integrated into the strut structure.
Fits:
Porsche 997 C2 / C2S / C4 / C4S MKI 2005-08 - Cars with SPORT chassis (Option code: I030/I480)
Porsche 997 C2 / C2S / C4 / C4S MKII 2009-12 - Cars with SPORT chassis (Option code: I030)
Porsche 996 C2 / C2S / C4 / C4S - Cars with SPORT chassis (Option code: IX74 / M030)
This acts as a progressive load-bearing element, cushioning the suspension when the strut nears full compression. It helps prevent harsh bottoming-out, protecting both the strut and chassis from damage during aggressive driving or over bumps.
These components maintain ride quality and handling performance, especially under heavy loading or spirited cornering, keeping the suspension linear and controlled.
Common Issues & Considerations
Wear or Deterioration: Over time, the rubber can compress, crack, or lose elasticity, diminishing its effectiveness. This can lead to harsher suspension impacts at full compression.
Noise or Harsh Feedback: A worn or hardened bump stop can transmit noise or impacts through the cabin, particularly over rough roads or speed bumps.
Sport vs. Standard Suspension: These parts are specific to Sport chassis models. Non-sport setups may not have the same bump stops or use different part numbers, so swapping or replacing must be done accordingly.
Click 'Zoom in' for large parts diagram.
Diagram ref no 9
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99634398009
The product you are viewing cross references to these numbers
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
- Porsche 914 (1970-1976)
The OE Match Front Top Mount Cover Plate (One-Bore) is a high-quality replacement suspension mounting component designed to secure and protect the front suspension top mount assembly. Manufactured to OE specifications for fit, strength and durability, this cover plate forms an integral part of the front suspension mounting system, helping to distribute loads and ensure secure attachment of suspension components to the chassis.
Fits:
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
- Porsche 914 (1970-1976)
Diagram Ref No 13
Constructed from durable automotive-grade materials, the cover plate is engineered to withstand the stresses generated by suspension movement, steering inputs and road impacts. Featuring a single-bore design, it provides precise alignment and support for the associated top mount assembly while helping maintain the structural integrity of the suspension mounting area.
What This Product Does:
- Secures and supports the front suspension top mount assembly.
- Helps distribute suspension loads into the chassis structure.
- Maintains correct positioning of suspension mounting components.
- Supports proper suspension geometry and alignment.
- Protects the top mount installation area.
- Contributes to suspension stability and handling performance.
- Helps ensure reliable operation of the front suspension system.
- Supports long-term structural integrity of the mounting assembly.
Symptoms Of Wear Or Failure:
- Looseness within the suspension top mount assembly.
- Suspension knocking or clunking noises.
- Visible corrosion or deformation of the cover plate.
- Misalignment of suspension mounting components.
- Excessive movement at the top mount location.
- Uneven suspension loading.
- Premature wear of top mounts and associated hardware.
- Difficulty maintaining suspension alignment.
- Visible damage caused by impact or corrosion.
Why Replacement Matters:
- The front suspension mounting area is subjected to constant forces generated by steering, braking, cornering and road surface irregularities. Over time, mounting hardware and cover plates can suffer from corrosion, fatigue, impact damage or distortion, reducing their ability to properly support the suspension assembly.
- A damaged or weakened cover plate can compromise suspension stability and place additional stress on top mounts, shock absorbers and surrounding chassis components. If left unresolved, mounting issues may lead to accelerated suspension wear, reduced handling precision and costly repairs.
- Replacing a worn or damaged cover plate restores secure suspension mounting, maintains proper load distribution and helps preserve the integrity of the front suspension system. An OE Match replacement provides factory-style fitment, durable construction and dependable long-term performance, ensuring your Porsche continues to deliver the handling, comfort and safety expected from its suspension design.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91150193400
The product you are viewing cross references to these numbers
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
- Porsche 914 (1970-1976)
Fits:
Porsche 911 / 912 / 930 / 914 All 1969-89
Will not fit SWB cars
High Density front strut mounts for your 911/914 not only replace tired factory rubber pieces, but return better handling and ride quality without being overly stiff. At 25% more stiff than stock, these are a great compromise, allowing the front suspension to maintain better alignment and geometry over bumps and around corners thanks to their increased stiffness. Still at home on a race track, these will ride with a feel closer to factory than that of our more track oriented full camber plate and monoball setups.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91134101800
The product you are viewing cross references to these numbers
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
- Porsche 914 (1970-1976)
Front
Fits:
Porsche 911 1970-89
Porsche 930 1975-89
Porsche 914 1970-76
Diagram ref no 9
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91134101800
The product you are viewing cross references to these numbers