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
