PERRIN Driveshaft Carrier Bushings - 08-25 Subaru WRX / 08-21 STI / 13-25 BRZ/FR-S/86

The PERRIN Driveshaft Carrier Bushings replace the soft OEM rubber bushings that mount the driveshaft carrier bearing to the chassis. Upgrading your driveshaft support bushings ensures your driveshaft is held firmly in place at all times.

Enhance stability under hard acceleration by minimizing wheel hop and boosting traction through decreased driveshaft movement with the PERRIN Driveshaft Carrier Bushings.

These bushings align the front and rear sections of the center driveshaft, correcting the OEM misalignment. Proper alignment minimizes wear on the driveshaft universal joints, resulting in smoother acceleration and enhanced performance.

What Do Driveshaft Carrier Bushings Do on Track?

Driveshaft carrier bushings support the center support bearing (CSB) and control drivetrain movement under load. In high-performance driving environments, the factory rubber bushings allow significant deflection during acceleration, deceleration, and high-RPM shifts. That deflection translates into driveline lash, inconsistent throttle response, and unwanted harmonics.

Upgrading to performance carrier bushings (polyurethane or solid) reduces compliance in the driveline system, resulting in:

• Improved throttle response – Less rotational wind-up before power reaches the differential

• More consistent power delivery – Reduced oscillation during on/off throttle transitions

• Sharper shift feel – Particularly noticeable during aggressive upshifts and clutch kicks

• Greater stability at high RPM – Minimizes driveshaft movement under sustained load

• Reduced drivetrain shock movement under hard launches

On Track

In HPDE and time attack scenarios, the biggest gains are consistency and predictability. Reduced driveline movement improves modulation when balancing the car mid-corner and during throttle application on corner exit.

In wheel-to-wheel racing, especially in high-power or high-grip setups, limiting driveshaft deflection becomes critical for durability and maintaining drivetrain alignment under extreme load.

Trade-Offs

• Increased NVH (noise, vibration, harshness)

• Slight increase in transmitted drivetrain harmonics

• Not ideal for comfort-focused street builds

Recommended For

• Intermediate to advanced HPDE drivers

• Time attack competitors

• Wheel-to-wheel race cars

• High-power street/track builds seeking sharper driveline response

Not Recommended For

• Daily-driven comfort builds

• Novice drivers unlikely to notice driveline compliance differences

Bottom Line:
If you’re pushing the car hard enough to expose drivetrain deflection under load, upgraded carrier bushings improve response, consistency, and durability. For casual street use, the added NVH outweighs the performance benefit.