
Upgrade the stability and precision of your Porsche’s front suspension with this high-density solid bushing for the lower control arm rear mount. Designed for the Porsche 996 and Boxster 986, this bushing replaces the standard rubber insert with a firmer compound that minimises unwanted movement and preserves suspension geometry under load. Ideal for both street and track use, it keeps your front suspension aligned, reactive, and crisp.
Sold As A Set.
x2 Sets Required Per Car.
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 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 996 GT2 2001-05
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
Fits On To Diagram Ref No 6
What This Product Does:
- The lower control arm rear bushing sits at the pivot or mount of the control arm on the front suspension. Its job is to allow controlled articulation of the arm while also restraining unwanted movement.
- By using a solid or high-density material instead of a standard soft rubber, the bushing significantly reduces unwanted flex or compliance. As a result, the suspension geometry (camber, toe, alignment) remains more stable under load (cornering, acceleration, braking).
- Less compliance in this mount means the front suspension reacts more precisely to driver input and chassis motion, improving handling stability, especially in modified or performance-oriented setups.
Symptoms & When To Need It:
- Front end feeling loose or vague in corners; the car may “step out” or have inconsistent behavior under heavy load.
- Uneven or accelerated tyre wear on the front due to alignment changing under load.
- The front suspension feels soft or sloppy, especially if the car has been lowered or has stiffer springs/anti-roll bars installed.
- The original rubber bushing shows signs of wear: cracking, splitting, excessive compression, or visible deformation.
- You’re upgrading the suspension and wish to reduce deflection in the pivot area to maximise benefits of other upgrades.
Why Replacement / Upgrade Matters:
- Over time the factory rubber bushings soften, deteriorate, or lose their design stiffness. This can degrade suspension accuracy and handling feel.
- Upgrading to a solid or high-density bushing restores the mount’s rigidity, keeps geometry more consistent, and enhances control — especially useful in performance, track, or modified cars.
- Better control arm mounting means less unwanted movement in the front suspension, which helps maintain alignment and improves driver confidence.
- For anyone restoring their Porsche or refreshing the chassis, upgrading key bushings like this one is a foundational step to ensure the car handles as well as it looks.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99634105319
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 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 996 GT2 2001-05
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04