Hybrid aluminum/urethane rear control arm bushings that include caster adjustment. These bushings are near-solid/no-play bushings intended for track or race use. The solid aluminum housing surrounds a thin layer of Black Series bushing material to ensure 'near-zero' bushing deflection. The mounting hole is offset to allow new caster setting - for maximum performance, install with center sleeve closest to the inside of the car. These bushings have been carefully designed to drastically reduce bushing deflection while not being fully solid. The race-spec urethane ensures a small amount of deflection is still available to provide steering feedback to the driver The Black Series bushings outperform the regular Powerflex Street bushings on the track but will be less forgiving for street use.
Note: Price is for the pair of bushings.
Powerflex polyurethane bushings are designed to decrease the amount of deflection in your car's suspension which improves handling, driver feedback, and tire wear. Powerflex uses their own premium polyurethane formulation to provide minimal NVH (noise, vibration, harshness) and increased longevity over stock rubber bushings.
Bushings are produced in one of three durometers – Yellow (70A, approximately 25% stiffer than stock), Purple (80A, approximately 30% stiffer than stock), and
Black (95A, approximately 80% stiffer than stock). Unlike other brands using only one urethane grade for all applications, Powerflex design engineers choose the correct hardness to allow for the specific movement or rigidity required for each location while minimizing unwanted NVH.
Powerflex urethane hardness is standardized per fitment and location. This takes out the guess work, so when you choose Street, you know our design engineers have selected the optimal polyurethane hardness for your specific application. Select parts are also available in an optional stiffer urethane (Black Series) for track and autocross performance where NVH is less important.
