Perrin 15-21 Subaru WRX STI Diffrential Lockdown System - PSP-DRV-536

Enhance Driving Precision. The PERRIN Rear Differential Lockdown minimizes rear differential movement to improve throttle response and drivetrain precision under all driving conditions. Eliminating excess flex during acceleration delivers a firmer, more connected feeling, perfect for street and track driving.

Noise, Vibration, Harshness. The PERRIN Rear Differential Lockdown reduces movement from the rear differential to enhance driver feel while adding minimal noise, vibration, and harshness (NVH).