PERRIN 02-07 Subaru WRX / 04-07 STi / 93-07 Impreza / 98-08 Forester Rear Differential Lockdown

The PERRIN Rear Differential Lockdown is made from solid 6061-T6 aluminum, a strong and lightweight material chosen for its ability to handle the stresses of hard driving. This part is designed to bolt directly onto your Subaru's rear differential mount, and its primary job is to reduce the amount of flex and movement that the differential can experience under acceleration and braking. By limiting this unwanted motion, you'll notice a more direct connection between your engine and the wheels, leading to sharper throttle response and a more predictable feel when you're pushing the car hard.

When you're accelerating, especially with a more powerful engine or during spirited driving, the rear differential can twist and shift. This lockdown brace acts like a solid anchor, preventing that movement. It's a straightforward upgrade that makes a notable difference in how the car feels when you get on the gas or when you're braking into a corner. It's a popular choice for Subaru owners looking to firm up the drivetrain without going for a full rebuild.