Cusco LSD 165 L15 Type RS 1.5-Way Limited Slip Differential

The Cusco LSD 165 L15 Type RS is a high-performance 1.5-way limited slip differential (LSD) engineered for competition and spirited street driving. Proven in the All Japan Gymkhana Championship, the Type RS completed full competitive seasons without requiring a single overhaul — a testament to its exceptional durability and reliability under demanding conditions.

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

Key Features:

• Reduced initial torque: 50–70% lower than conventional cone plate LSDs for improved response and efficiency
• Low power loss: Optimized for better lap times across a wide range of performance builds
• Minimal chatter: Engineered to keep noise and vibration low during operation
• Improved clutch plate durability: Low-pressure clutch plates reduce wear and deterioration
• Enhanced oil flow: Smoother oil circulation between plates increases LSD efficiency
• Precision coil springs: Special precision springs set in the pressure plate ensure consistent and steady coil movement
• No plate sticking: Clutch plates remain separated unlike conventional cone plate designs, significantly extending service life

Understanding Cusco LSD Engagement Types:

• 1-Way LSD: Engages only under acceleration; acts as a true open differential on deceleration. 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. Recommended for drivers who want performance without aggressive oversteer tendencies.
• 2-Way LSD: Engages on both acceleration and deceleration. Best suited for rear-wheel drive and AWD rear axle applications where aggressive driving and large-angle drifting are desired.

The Cusco Type RS LSD is a benchmark in Japanese motorsport engineering, combining race-proven durability with street-friendly drivability in a single precision-built unit.