Cusco LSD 193 LT15 Type RS 1.5-Way Limited Slip Differential

The Cusco LSD 193 LT15 is a Type RS 1.5-Way limited slip differential engineered specifically for 2009-2019 Lexus IS250/350 and 2010-2019 GS350/450h models. This rear differential upgrade delivers superior traction and power distribution for enhanced performance on both street and track applications.

Type RS Coil Spring Design:

• Utilizes precision coil springs instead of conventional cone springs for consistent preload and extended service life
• Springs apply constant pressure to clutch plates, minimizing loss of initial torque over time
• 50-70% lower initial torque compared to conventional cone plate LSDs for reduced drive friction and improved response
• Adjustable preload by adding or removing springs for personalized tuning

1.5-Way Configuration:

• Full engagement during acceleration for maximum traction
• Partial engagement under deceleration to reduce understeer
• Ideal for rear-wheel drive performance applications and spirited driving
• Dual ramp angle profiles allow switching between 1.5-way and 2-way settings

Performance Advantages:

• Minimal chattering and smooth operation thanks to even pressure distribution across clutch plates
• Low-pressure design improves durability and extends clutch plate life
• Enhanced oil flow between plates for better thermal management
• Prevents clutch plate sticking and deformation common in traditional LSDs

Backed by Cusco's decades of motorsport experience and proven in Japanese Gymkhana Championship competition. This B-size differential is designed for Lexus vehicles with Torsen-type factory differentials and delivers race-proven reliability for street and competition use.