OS Giken Subaru Impreza STI GDB (Rear) Super Lock LSD

OS Giken is well-known for making high-performance drivetrain components, and their Super Lock Limited Slip Differential (LSD) for the rear of your 2007-2011 Subaru Impreza STI GDB is a prime example. If you're looking to improve traction and handling, especially during spirited driving or on track, an LSD is a critical upgrade. This unit replaces your factory open differential, allowing both rear wheels to receive power more effectively, even when one wheel has less grip. This means better acceleration out of corners and more stable handling under load.

The Super Lock LSD uses a unique multi-plate design that OS Giken has refined over years of racing. It's designed to provide a strong locking effect when needed, but it can also allow for a degree of differential action during normal driving to avoid binding. This balance is key for a street-driven car that also sees track time. The internal components are made from durable materials, and the unit is built to handle the stresses of performance driving. Installation involves removing the rear differential housing and replacing the factory unit with the OS Giken LSD. It's a job that requires specific tools and knowledge of drivetrain components, so professional installation is often recommended.

When installing this LSD, it's important to follow the manufacturer's break-in procedure carefully to ensure the clutch plates seat properly. This typically involves a period of gentle driving with specific acceleration and deceleration patterns. Proper gear oil is also crucial; OS Giken recommends a specific type of LSD oil to maintain performance and longevity. This differential is a significant upgrade for any STI owner looking to maximize their car's performance potential.