Cusco LSD BM5 L2 Type RS 2-Way Limited Slip Differential

The Cusco LSD BM5 L2 is a Type RS 2-Way (1.5 & 2-Way) Limited Slip Differential engineered for demanding performance and competition use. Race-proven in the All Japan Gymkhana Championship, the Type RS completed full competitive seasons without a single overhaul, demonstrating exceptional durability under extreme conditions.

At the heart of the Type RS design is a coil spring pressure system that sets it apart from conventional cone plate LSDs. Activation pressure is applied in the same direction as initial torque via a precision coil spring, resulting in initial torque that is 50–70% lower than traditional cone plate designs. This translates to lower drivetrain friction, smoother clutch engagement from a non-operational to fully-locked state, and superior throttle response.

Key Features:

• Coil Spring Pressure Design: RS Springs inside the pressure rings apply consistent pressure against clutch plates at all times, minimizing initial torque loss over time and ensuring stable, predictable operation
• Low Initial Torque: Reduces power loss for improved lap times even in mildly tuned vehicles, while enabling smooth cornering when the LSD is not actively engaged
• Reduced Chatter: Consistent, evenly distributed pressure across friction plate surfaces minimizes clutch chatter and noise
• Improved Durability: Lower clutch plate pressure prevents plate sticking, reduces surface wear and deterioration, and extends service intervals compared to conventional cone plate designs
• Oil-Through System: Cusco's exclusive radially cut clutch plate grooves and oil-through design promote instant, efficient oil movement throughout the unit, improving lubrication and overall LSD efficiency
• Adjustable Configuration: Clutch plate stack and spring count can be customized to fine-tune locking characteristics and responsiveness to suit driving style
• 2-Way Operation (1.5 & 2-Way Selectable): Engages on both acceleration and deceleration — ideal for rear-wheel-drive applications, aggressive driving, and high-angle drifting

Understanding Cusco LSD Operation Modes:

• 1-Way LSD: Activates under acceleration only; acts as an open differential on deceleration. Best suited for front-wheel-drive and AWD front axle applications.
• 1.5-Way LSD: Activates fully under acceleration with reduced locking effect under deceleration, minimizing understeer. Recommended for drivers sensitive to understeer behavior.
• 2-Way LSD: Activates on both acceleration and deceleration. Recommended for rear-wheel-drive and AWD rear axle vehicles, and preferred by drivers seeking aggressive cornering and maximum drift angle.

The Cusco Type RS LSD is a benchmark competition-grade differential that delivers consistent, race-proven performance with the street manners to complement both track and spirited road use.