2008-2012 Mitsubishi EVO-X Perrin Adjustable Caster PSRS Perrin offers the adjustable caster Positive Steering Response Kits (PSRS) for the 2008-2012 Lancer Evolution X. Caster is the angle at that the steering knuckle rotates on. Adding caster can make your EVO-X turn in faster by providing a larger contact patch as the wheels turn on the steering axis. A Perring PSRS is an anti-lift kit (ALK) designed to prevent wheel lift under hard acceleration in cornering. The anti-lift part of the kits are a very small feature compared to the overall benefits gained from using the solid connection the PSRS provides. The PSRS replaces the front control arm's rear bushing. The Evo's OEM bushing is designed to be compliant to reduce NVH, making the ride more comfortable. The compliancy of the Mitsubishi OEM bushing is not something a performance oriented driver is looking for. Eliminating the Evo's rubber OEM bushings provides significant improvement in how the car steers during hard cornering and even improves handling and stability in a straight line. The Perrin EVO-X PSRS kit with caster adjustment also provides a solid bushing but relocates the OEM control arm to subframe mounting point to be off center. The non-concentric hole allows your (or your installer or alignment specialist) to rotate the bushing to adjust your Evo's caster (some racing classes do not allow for an offset bushing, refer to your organization's rules for legality). The adjustable Perrin Evo PSRS can provide nearly 1.5 degrees of additional caster to your 2008-2012 Evolution.
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