Cusco LSD 328 C15 Type RS 1.5-Way Limited Slip Differential

The Cusco LSD 328 C15 Type RS is a 1.5-way limited slip differential engineered for serious performance driving. Proven in the All Japan Gymkhana Championship, the Type RS completed a full competitive season without requiring a single overhaul — a testament to its exceptional durability and reliability under demanding race conditions.

Cusco's in-house testing demonstrates that the Type RS delivers initial torque 50–70% lower than conventional cone plate-type LSDs. This reduction in drive friction translates directly into improved throttle response, lower power loss, and faster lap times — even in mildly tuned vehicles.

Key Features:

• Competition-proven durability — survived a full Gymkhana championship season without overhaul
• Reduced initial torque — 50–70% lower than conventional cone plate LSDs for better response
• Low chattering — smooth, quiet operation under normal and spirited driving
• Extended clutch plate life — low-pressure design prevents plates from sticking, reducing wear and deterioration
• Improved LSD efficiency — optimized oil flow between plates for consistent performance
• Special precision springs — set into the pressure plate to ensure steady, reliable coil movement
• Lower power loss — delivers improved lap times across a wide range of power levels

Understanding Cusco LSD Action Types:

• 1-Way LSD: Engages only under acceleration; acts as an open differential when off-throttle. Ideal for front-wheel drive and AWD front axle applications.
• 1.5-Way LSD (this unit): Engages under acceleration with reduced locking effect under deceleration compared to a 2-way. The ideal balance for drivers who want performance without excessive understeer on corner entry.
• 2-Way LSD: Engages under both acceleration and deceleration. Best suited for rear-wheel drive and AWD rear axle applications where aggressive driving and high-angle drifting are desired.

The Cusco Type RS 1.5-Way LSD is the preferred choice for drivers seeking a competition-grade differential that balances aggressive acceleration lockup with predictable, manageable deceleration behavior.