Cusco LSD RS-1way(35&45) Front GDB(C) GRB GVB STI Impreza
Cusco

Cusco LSD RS-1way(35&45) Front GDB(C) GRB GVB STI Impreza

$1,332.00

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The Cusco Type RS 1-Way Limited Slip Differential is built for serious cornering performance where stability under throttle is the highest priority. Designed with motorsport DNA, this LSD activates fully under acceleration, providing locked differential behavior to both wheels, while allowing freewheel characteristics under deceleration. This results in stable, predictable exit grip and minimal disruption when trail braking into corners — making it the go-to choice for front-wheel drive time attack builds or high-speed grip setups.

The RS design utilizes a lighter spring pre-load system than traditional clutch-type LSDs, reducing initial torque transfer for smoother engagement and improved daily drivability. The 1-Way configuration is ideal for drivers who prioritize on-throttle stability but want reduced intervention during braking and turn-in. Compared to the 1.5-Way or 2-Way RS units, this version offers the softest behavior under decel, allowing cleaner trail braking and sharper rotation — perfect for grip-focused setups.

The RS series also reduces internal wear and heat thanks to its low initial torque and optimized ramp angles. The internal clutch packs are immersed in differential oil for superior cooling, and the forged casing ensures long-term reliability under hard use. Whether you’re setting a PB on a circuit or carving up technical backroads, the Type RS 1-Way LSD brings surgical precision to your drivetrain.

  • Fully locking on acceleration; open under deceleration (1-Way behavior)
  • Ideal for FWD or rear-biased AWD setups with heavy on-throttle dynamics
  • Reduces lift-off oversteer and promotes clean trail braking
  • Smooth engagement with low initial torque for daily drivability
  • Uses RS coil spring pre-load system for linear, controlled locking
  • Quicker response and less understeer vs. 1.5 or 2-Way in certain cases
  • Oil-immersed clutch packs with superior heat management
  • Forged case and serviceable design for long-term use and rebuildability

Compared to the 1.5-Way and 2-Way, the 1-Way RS is the most forgiving under braking, making it an excellent match for technical tracks or FF platforms. Enthusiasts looking for rear-end rotation under braking may prefer the 1.5 or 2-Way, but for stability on throttle and clean entry, the 1-Way is unmatched.

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