Perrin Performance [12-26 Subaru WRX, STI, Forester XT, Impreza, Crosstrek] Differential Lockdown System

The PERRIN Rear Differential Lockdown for 2012–2026 WRX, STI, Forester XT, Impreza, and Crosstrek is a drivetrain support component designed to limit rear differential movement and improve throttle response and drivetrain precision.

• Minimizes excessive rear differential motion under acceleration by locking down the differential mounting area to reduce drivetrain “slop.”
• Precision machined aluminum lockdown plates included for solid support and long-lasting performance.
• Engineered for direct bolt-on installation using basic hand tools; typical install time around 45 minutes.
• Enhances driver feel by tightening drivetrain feedback with minimal increase in noise, vibration, and harshness (NVH).
• Includes a set of two aluminum plates, warranty documentation, and installation instructions.

The design helps give a firmer, more connected sensation during hard throttle events on both street and track, making the rear end feel more responsive without requiring specialized tools to fit.