Perrin PSP-SUS-525 Subframe & Diff Lockdown Kit (WRX/STi 01-07)

Add drive train rigidity and precision to throttle input to your Subaru with our PERRIN Performance Diff Lock Down System.

Differential Lockdown

The PERRIN rear diff lock down (DLS) consists of 4 urethane bushings that lock the differential by stiffening the front and rear mounts for zero movement under extreme conditions such as drag racing and road racing. This DLS removes the twisting movement from the rear differential which can cause a "squishy" or spongy feeling at the point of initial acceleration.

Subframe Lockdown

The subframe lockdown kit includes 2 urethane bushings, two metal sleeve washers and 2 bolts. They work together to solidify and lock the rear subframe in place, eliminating all driveline slop and that annoying thud from first to second gear.