Cusco LSD MZ-1.5 (2way) Rear GC8 GDB GRB GVB STI Impreza

If you're looking to get the most out of your 2004-2007 Subaru Impreza on the track or during spirited driving, a limited slip differential (LSD) is a serious upgrade. This Cusco MZ-1.5 way rear LSD is designed to help put power down more effectively, especially when exiting corners or in low-traction situations. It works by locking the rear wheels together more under acceleration, which helps prevent one wheel from spinning while the other has grip. This means more of your engine's power gets to the pavement, improving acceleration and overall handling balance.

Cusco's MZ-1.5 way design offers a unique blend of performance. In a 1.5 way LSD, it engages fully on acceleration, providing strong locking force to maximize traction. However, on deceleration, it offers a partial lock, which helps stabilize the rear end during braking and corner entry without being overly intrusive. This makes it a popular choice for drivers who want a noticeable improvement in grip and control without sacrificing too much daily drivability. The unit itself is well-built, using durable materials to withstand the stresses of performance driving.

This differential is a direct replacement for your factory unit, though installation will require removing the rear differential housing and potentially some specialized tools. It's a job best suited for a mechanic experienced with drivetrain components. When installed, you should notice a significant change in how the car puts power down, with less wheel spin and a more planted feel. This Cusco LSD is a solid option for Impreza owners serious about improving their car's performance capabilities.