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Cusco RS 1.5-way front LSD LSD 184 C15 for Subaru STI on white background
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Cusco LSD RS1.5 Front GDB(C) GRB GVB STI Impreza

Cusco
CUSLSD 184 C15
4996338017239
Differentials
4 Units In Stock - Ships Next Business Day
$ 1,480.00 $ 1,332.00
$ 1,332.00

SKU: LSD 184 C15 | UPC: 4996338017239

Cusco RS 1.5-Way Limited Slip Differential Front Subaru Impreza WRX STI GDB C-G GRB GVB 2002-2014 6-Speed Manual

Cusco RS 1.5-way LSD LSD 184 C15 installs in the front differential of 2002-2007 GDB C-G and 2008-2014 GRB GVB Subaru Impreza WRX STI 6-speed manual models. This clutch-type unit locks aggressively under acceleration for power to both wheels cuts understeer and boosts corner exit speed. It maintains smooth 1-way lock on deceleration for daily driving with minimal noise.

Key Features

  • 1.5-Way Clutch Operation: Strong full lock under acceleration 1-way lighter lock under deceleration for sharp handling balance on street and track.
  • Initial Torque Setting: Factory 6-8 kgf-m adjustable via clutch plate kits for custom lock strength.
  • Clutch Plate Count: 8+8 plates total 16 deliver progressive smooth engagement without harsh binding.
  • RS Pressure Rings: Spring plate design ensures fast response low maintenance and consistent performance.
  • Bolt-In Fitment: Direct replacement for stock open or viscous diff retains factory ring gear and axles.

Product Notes

  • Part number LSD 184 C15 fits 6MT STI front only not 5MT or automatic transmissions.
  • Change to Cusco LSD oil post-install for optimal clutch life and operation.
  • Product weight 8-9 kg package ships at 22-25 lbs in 14 x 14 x 12 inch box.

Installation Notes

  • Professional installation recommended.
  • Requires full transmission removal typical time 8-12 hours.
  • Follow 500 km break-in with gentle driving before track use.

This Part Fits

Year Make Model Submodel
2002-2007 Subaru Impreza WRX STI GDB (C-G) 6MT
2008-2014 Subaru Impreza WRX STI GRB / GVB 6MT

Why Choose Cusco?

  • Decades of success in Japanese rally and drift competitions.
  • RS 1.5-way design favored in STI street and track builds worldwide.
  • Engineered in Japan to JQA standards for durability and precise control.

Frequently Asked Questions

  • Q: Does it fit 5MT STI models?
    A: No designed only for 6-speed manual front differentials in GDB C-G GRB GVB STI.
  • Q: How does 1.5-way differ from 1-way or 2-way?
    A: Provides full accel lock with lighter decel for best street track balance over pure 1-way traction or 2-way drag focus.
  • Q: Is the lock strength adjustable?
    A: Yes add or remove clutch plates with Cusco kits to tune initial torque beyond factory 6-8 kgf-m.

Shipping & Handling

  • Method: Standard ground shipping
  • Availability: In stock - ships same or next business day
  • Packaging: 14 x 14 x 12 inches approx
  • Weight: 22-25 lbs package 8-9 kg product

Request For Information

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