Perrin Differential Lockdown System 2015-2021 WRX / 2015-2021 STI

Add drivetrain rigidity and precision to throttle input to your Subaru with our PERRIN Differential Lockdown Kit. The PERRIN rear diff lock down locks 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.