Cusco LSD BM5 L15 Type RS 1.5-Way Limited Slip Differential

The Cusco Type RS Limited Slip Differential (LSD) is a competition-proven performance upgrade engineered for drivers who demand precision, durability, and consistent response. Validated through full seasons of the All Japan Gymkhana Championship without requiring a single overhaul, the Type RS LSD delivers race-ready reliability straight from the box.

Through Cusco's in-house research and development, the Type RS achieves an initial torque 50–70% lower than conventional cone plate-type LSDs. This reduction in drive friction translates to sharper throttle response, reduced power loss, and faster lap times — even on mildly tuned street cars.

Key Features:

• Competition-proven design — survived full Gymkhana championship seasons without overhaul
• Lower initial torque — 50–70% less than conventional cone plate LSDs for reduced drivetrain friction
• Reduced chatter — smooth, quiet operation under both street and track conditions
• Improved clutch plate longevity — low-pressure clutch pack design minimizes wear and deterioration
• Enhanced oil flow — optimized channel design between plates increases LSD efficiency
• Precision coil springs — special springs set within the pressure plate ensure consistent and steady engagement
• No plate sticking — clutch plates separate cleanly, unlike traditional cone plate units, reducing long-term wear

This unit is configured as a 1.5-Way LSD. Cusco Type RS LSDs are available in three engagement configurations to match your driving style and application:

• 1-Way LSD: Engages under acceleration only; releases under deceleration for neutral handling. Ideal for front-wheel drive and AWD front axle applications.
• 1.5-Way LSD: Engages firmly under acceleration with a milder deceleration lock effect compared to a 2-way. Reduces the tendency toward understeer on corner exit. Best for drivers transitioning from open differentials or those sensitive to oversteer.
• 2-Way LSD: Engages equally under both acceleration and deceleration. Recommended for rear-wheel drive and AWD rear axle cars. Ideal for aggressive driving styles and high-angle drift applications.

The Cusco Type RS LSD is a direct upgrade for performance-oriented applications, offering a measurable improvement in traction, cornering balance, and overall driver confidence without sacrificing streetability.