Perrin Rear Differential Lockdown System WRX / STI (2008-2014) Mercedes - Ideal for use with

- Ideal for use with any Turbosmart boost controller

They feature a free-flowing

Technology that rivals expensive Original Equipment electronic systems

8741-1412Sport - Koni Adjustable Front

WRX -- (2008-2014)

Perrin Rear Differential Lockdown System WRX / STI (2008-2014) Mercedes - Ideal for use withAdd drivetrain rigidity and precision to throttle input to your Subaru WRX STI 2008 2014 with this PERRIN Performance Differential Lockout Kit. PERRIN Differential Lockdown kit consists of 2 aluminum plates and 4 urethane bushings to completely remove any and all movement from the rear differential under all conditions. From performance street driving, to road racing, drifting or drag racing this will handle and improve it all! Under these conditions