Cusco BMW E46 M3 / E60 M5 / E92 M3 LSD RS 1.5 Way (35/20 Ramp)

The Cusco RS 1.5 Way Limited Slip Differential (LSD) for your 2001-2006 BMW M3 features a specific 35/20 ramp angle. This design choice is crucial because it dictates how the differential locks and unlocks during cornering. A 1.5-way LSD offers a balance, providing strong locking under acceleration to put power down effectively, while also offering a degree of locking during deceleration to help stabilize the rear end through turns. This can make a notable difference in how the car feels when pushed, offering more confidence and control.

Cusco is well-known for its performance drivetrain components, and this RS series LSD is built with their experience in mind. The RS series is designed for enhanced performance and durability, making it a solid option for M3 owners looking to improve their car's handling characteristics, whether on the street or the track. The specific ramp angle is engineered to provide a predictable and aggressive locking action, which can significantly reduce wheel spin and improve corner exit speeds. This unit is designed to fit directly into your M3's existing differential housing, simplifying the installation process compared to some other aftermarket options.

When installing a performance LSD like this, it's important to use the correct differential fluid recommended by Cusco. This ensures the clutch plates inside the differential operate as intended and prolongs the life of the unit. Proper break-in procedures, as outlined by Cusco, are also recommended to seat the clutch plates correctly. This LSD is a significant upgrade for any E46 M3 owner looking to maximize grip and improve the car's overall performance envelope.