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- Porsche Boxster S 986 3.2L 1999-02
- 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 2009-2012
- Porsche Boxster S 987 MKII 3.4L 2009-2012
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 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
This is a pair (set of 2) OE Match front stabilizer bar bushes for Porsche models using part reference 99634379217. Replacing both bushes together helps ensure balanced support and consistent stabilizer bar operation left-to-right.
SET OF 2
Fits:
Porsche 986 Boxster S 3.2L 2000>>
* Cars with Sport-type chassis
Porsche 987.1 Boxster 2005 - 2008
* Cars with standard chassis and Manual Transmission
Porsche 987.1 Boxster / S 2005 - 2008
* Cars with PASM (electronic damper control)
Porsche 987.2 Boxster 2009 - 2012
Porsche 987C.1 Cayman 2005 - 2008
Porsche 987C.2 Cayman 2009 - 2012
Porsche 996 TARGA 2002>>
* Cars with Sport-type Chassis (M030) and Tiptronic Transmission (M249)
Porsche 997.1 C2 CABRIO / COUPE 2005 - 2008
* Cars with Standard Chassis (I029) and 6-speed manual transmission (I480)
Porsche 997.1 C2S COUPE 2005 - 2008
* Cars with Sport-type Chassis (I030)
Porsche 997.1 C2/C2S COUPE / CABRIO 2005 - 2008
* Cars with PASM (electronic damper control) (I475)
Porsche 997.2 C2 COUPE / CABRIO 2009 - 2012
* Cars with Standard Chassis (I029) and PDK Transmission (I250)
Porsche 997.2 C2/C2S COUPE 2009 - 2012
* Cars with Sport-Type Chassis (I030)
Porsche 997.2 C2/C2S COUPE/CABRIO 2009 - 2012
* Cars with PASM (electronic damper control) (I475)
Diagram Ref No 2.
Replacing bushes in pairs restores uniform stabilizer bar support across both mounting points. This helps reduce noises, improves steering response consistency, and keeps handling predictable under cornering loads.
Function: The pair securely locates the stabilizer bar while allowing controlled rotation during suspension travel. Together they maintain the bar’s effectiveness in limiting body roll without unwanted movement or knocking.
What stabilizer bar bush does:
• Cushions and secures the stabilizer (anti-roll) bar to the chassis, reducing vibration and road noise
• Helps maintain proper sway bar function by allowing the bar to pivot while minimizing unwanted movement
• Preserves handling precision and vehicle stability during cornering by preventing excessive body roll.
If one bush is worn, the other is usually not far behind. A mismatched pair can lead to uneven stabilizer bar support and persistent noises. Fitting a set of two helps restore factory-like feel, reduces repeat labour, and improves long-term reliability of the front anti-roll bar mounting.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99634379217
The product you are viewing cross references to these numbers
This kit is comprised of the following items:
Anti-Roll Bars (ARB’s) play an important role in a vehicle’s suspension system, helping to reduce body roll by transferring cornering load from one side of a vehicle to the other.
Often mounted to the vehicle’s chassis with rubber bushes, these bushes ensure the bar works as intended. To prevent the anti-roll bar from moving laterally within its mounts when turning, OE manufacturers will either bond the bushes to the bar, add dead-stops to the bar itself, or rely solely on the clamping pressure of the rubber.
But what happens when those bushes wear and need to be replaced? Often anti-roll bars with bonded bushes come as a costly complete assembly, so the alternative is to fit a more cost-effective unbonded polyurethane replacement, like the many we offer.
In most cases, friction from the bush will prevent any side-to-side bar movement. Still, when turning aggressively or cornering at higher speeds, a laterally shifting anti-roll bar decreases the efficiency and effectiveness of the bar, changing the dynamics of your suspension system in unpredictable ways. It also poses the risk of the bar fouling on other areas of the vehicle or suspension system.