Perrin Offset Positive Steering Response System for Scion FR-S Subaru BRZ - Discontinued
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The bushing in the PSRS is purposely offset from center-line. This adds almost 0.6 degrees of caster to the front suspension. Caster is the angle on which the steering knuckle rotates. Adding caster makes the car turn in faster by providing a larger contact patch as the wheels turn on the steering axis.
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