Cusco LSD BM1 F2 Type RS 2-Way Limited Slip Differential

The Cusco Type RS Limited Slip Differential (LSD) is a competition-proven performance differential engineered for drivers who demand reliability and precision. The Type RS LSD completed an entire All Japan Gymkhana Championship season without requiring a single overhaul, with drivers and teams achieving podium and championship results throughout.

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

Key Features:

• Reduced initial torque — 50–70% lower than conventional cone plate LSDs for less drive friction and improved response
• Low power loss — contributes to better lap times across a wide range of builds and power levels
• Minimal chatter — engineered for a smooth, quiet differential operation
• Enhanced durability — low-pressure clutch plates reduce wear and extend service life
• Optimized oil flow — smoother fluid circulation between plates increases LSD efficiency
• Precision coil springs — special springs set within the pressure plate ensure consistent and stable engagement
• No clutch plate sticking — unlike conventional cone plate LSDs, clutch plates remain separated, significantly reducing plate wear and deterioration

This unit is a 2-Way LSD, recommended for rear-wheel drive and AWD rear axle applications. A 2-way LSD activates on both acceleration and deceleration, making it ideal for drivers who prefer aggressive driving styles, including large-angle drifting and high-commitment corner entry.

Cusco LSD Operation Modes — Comparison:

• 1-Way LSD: Activates under acceleration only; releases under deceleration for natural understeer behavior. Best suited for front-wheel drive and AWD front axle applications.
• 1.5-Way LSD: Activates under acceleration with mild deceleration engagement. Reduces understeer on deceleration compared to a 2-way setup. Ideal for drivers sensitive to oversteer.
• 2-Way LSD (this unit): Activates on both acceleration and deceleration. Recommended for RWD and AWD rear axle vehicles. Preferred for aggressive driving and drifting.

The Cusco Type RS LSD is a direct upgrade for performance and motorsport applications, combining race-validated durability with engineering refinements that deliver measurable gains on both track and touge.