Cusco LSD 450 F Type RS 1-Way Front Limited Slip Differential

The Cusco LSD 450 F Type RS is a high-performance 1-way front limited slip differential engineered for drivers who demand superior traction, quicker response, and long-term durability. Proven in the All Japan Gymkhana Championship — completing full seasons without a single overhaul — this clutch-type LSD delivers competition-grade performance backed by real-world motorsport results.

At the heart of the Type RS design is a coil spring pre-load system that sets it apart from conventional cone-plate LSDs. The activation pressure is applied in the same direction as the initial torque via precision RS springs, resulting in an initial torque that is 50–70% lower than traditional cone-plate units. This translates to lower drive friction, smoother engagement, and faster clutch plate response from a non-operational to a fully locked state — even at low initial torque settings.

Key Features:

• Low initial torque design — RS springs absorb and manage torque onset for smooth, progressive engagement with minimal power loss
• Reduced chattering — lower clutch plate pressure keeps NVH (noise, vibration, harshness) to a minimum
• Improved durability — clutch plates operate under lower pressure, reducing wear and extending service intervals
• Cusco Oil Through System — radially cut clutch plate grooves enable instant oil movement for superior lubrication and heat management
• Polished pressure ring contact surface — ensures flat, even contact with clutch plates for consistent clamping force
• Precision RS springs in the pressure plate — maintain steady coil movement and consistent preload over time
• No cone clutch sticking — multi-plate design eliminates the plate adhesion common in cone-type LSDs, reducing deterioration
• Adjustable engagement mode — the dual-profile pressure ring allows switching between 1-way and 1.5-way (or other combinations) without purchasing additional parts

LSD Configuration Guide:

• 1-Way LSD — Activates under acceleration only; releases as a true open differential on throttle lift. Ideal for front-wheel drive and AWD front axle applications. Best for reducing understeer while maintaining natural off-throttle handling.
• 1.5-Way LSD — Activates under acceleration with mild deceleration locking. Produces less understeer under deceleration than a 2-way setup. Recommended for drivers who want a balance between performance and predictability.
• 2-Way LSD — Activates on both acceleration and deceleration. Recommended for rear-wheel drive and AWD rear axle applications. Ideal for aggressive driving, high-angle drifting, and rally-style applications.

The Cusco Type RS LSD is built around the brand's ISO 9001-certified in-house manufacturing process, ensuring each unit meets strict quality and performance tolerances. Whether used on the street or the circuit, the LSD 450 F delivers consistent, tunable traction control that improves lap times and driver confidence without sacrificing drivability.