Cusco LSD RS 1.5-Way(1.5&2) Rear Subaru 08-13 SH Forester EJ25T / 5AT

This is the Cusco RS 1.5-Way limited-slip differential (LSD) for the rear of your 2008-2013 Subaru Forester equipped with the EJ25T engine and 5-speed automatic transmission. A limited-slip differential is a crucial component for performance driving, especially when cornering or accelerating out of turns. Unlike an open differential that sends power to the wheel with the least traction, an LSD actively distributes torque between both rear wheels, helping to prevent wheelspin and improve traction. This means better acceleration out of corners and more stable handling when you push your Forester.

The Cusco RS series LSD is designed for a balance of performance and daily drivability. Its 1.5-way activation means it engages more strongly during acceleration than deceleration. This provides a significant traction bias when you're on the throttle, helping to pull the car through corners. During deceleration, it offers a milder locking effect, which can make the car feel more predictable and comfortable during normal driving. The RS model uses a unique cam system that allows for smooth engagement and disengagement, reducing the chatter often associated with more aggressive LSDs. This unit is built with high-grade materials and precision machining to ensure durability and consistent performance over time. Installation involves replacing the factory differential, and it's recommended to have this done by a qualified technician familiar with drivetrain components.

When installing this differential, it's important to use the correct differential fluid as specified by Cusco. Proper break-in procedures, typically involving a period of gentle driving followed by a fluid change, are also essential to ensure the longevity of the LSD. This differential is a significant upgrade for any Forester owner looking to enhance their vehicle's handling and traction capabilities, particularly for spirited driving or track use.