Perrin Performance Positive Steering Response System
Application: Subaru Impreza WRX and STi
Years: WRX 2006 - 2007 and STi 2004 - 2007
Part Number: PSP-SUS-405

Get the most from steering input with the addition of othe Perrin PSR system. The system increases steering response in corners by adding additional caster angle, straight line performance by preventing lift when accelerating, and installs easily by eliminating the squishy factory rubber mount.. The increased width of plus size wheels adds enough leverage over the factory rubber mounts to literally pull the car side to side, even on slightly uneven pavement. This is extremely unnerving and can be completely eliminated with the PSR system. Impreza owners that want the increased caster angle but want more compliance in the ride can use the optional Urethane Bushing Set. Available for Impreza, WRX, STi and Legacy.

These kits are also known as the ALK or Anti-Lift-Kit. The anti-lift part of the kit is a very small feature compared to the benefits of the solid type connection the PSRS makes.  Eliminating the OEM super soft bushing provides significant improvement in how the car steers during hard cornering and even in a straight line.  So P.S.R.S stands for Positive Steering Response System.   The PSRS replaces the front control arm, rear bushing.  This OEM bushing is designed to be extra compliant to reduce NVH, and make the ride more comfortable. The compliancy of this bushing is not something a performance oriented driver is looking for.