Fitment: This Perrin differential lock - down system is a perfect fit for 2015 - 2021 Subaru WRX and 2015 - 2021 Subaru STI. Key Features: It's expertly designed to eliminate all rear - differential movement in every driving situation, whether you're on the street or the track. Say goodbye to the spongy feeling at initial acceleration. The plates are made of CNC - machined aluminum with an anodized black finish. Installation is a breeze, taking only about 30 minutes with included instructions. In the Box: You'll get two PERRIN aluminum lock - down plates, along with a warranty and installation instructions. Benefits: Enhance your Subaru's drivetrain rigidity and throttle - input precision. Under extreme racing conditions, it stops the drivetrain (including the diff) from twisting and moving, reducing squat during acceleration and eliminating power - transmission delays between the engine and wheels.

Using the Perrin Differential Lock - Down System: First, make sure your Subaru is parked on a flat and stable surface. Follow the detailed installation instructions included in the box. It should take about 30 minutes to install. Once installed, you can enjoy improved drivetrain performance right away. Note: Don't attempt installation if you're not familiar with basic automotive repair. If you have any questions, refer to the instructions or contact customer support. Maintenance: Periodically check the lock - down plates for any signs of wear or damage. Clean the plates with a mild automotive cleaner to keep the anodized black finish looking good. If you notice any issues, replace the plates as soon as possible to maintain optimal performance.