Kartboy Rear Differential Bushing Kit - Soft - 2002-2007 Subaru WRX / 2004-2007 Subaru STI PDM_shifter-and-bushing-combos With separate preload adjustment

With separate preload adjustment

which allows the Accessport to target higher boost and more aggressive ignition timing without exceeding safe charge temperatures

Improves the overall aerodynamic refinement by increasing the front-end downforce

Base pressure adjustable from 40-75 psi

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Kartboy Rear Differential Bushing Kit - Soft - 2002-2007 Subaru WRX / 2004-2007 Subaru STI PDM_shifter-and-bushing-combos With separate preload adjustmentKartboy 02 07 Subaru WRX 04 07 Subaru WRX STi Rear Differential Bushing Kit Soft