SKU: LSD 184 C | UPC: 4996338017222
Cusco LSD RS1 Front GDB GRB GVB STI Impreza 2002-2014
Cusco LSD RS1 Front is a clutch-type limited slip differential for Subaru Impreza WRX STI GDB GRB GVB chassis including 2004-2007 USDM STI and JDM variants. This 1-way LSD sends power evenly to both front wheels under acceleration for better traction and corner exit speed. Direct bolt-in replacement matches OEM 10.5-inch ring gear for easy install on track or street cars.
Key Features
- 1-Way Torque Sensing Design: Engages during acceleration with 45-degree cam angle for smooth power delivery and lockup under load delivering consistent traction out of corners.
- 8 Clutch Plates: High-capacity clutch pack with adjustable initial torque set at 15kgf-cm standard for tuning to track or daily driving needs.
- 10.5-Inch Ring Gear: Matches OEM specifications for direct bolt-in fit without axle or housing modifications.
- Precision Forged Gears: Chromoly steel bevel gears handle high horsepower up to 500hp with resistance to wear and heat.
- Lightweight Construction: Weighs 22 lbs to cut unsprung weight for sharper suspension response and improved chassis balance.
Product Notes
- Requires Cusco LSD oil LS-M1 for optimal clutch performance and longevity.
- Initial break-in period of 30 minutes recommended before full load use.
- Ships in protective foam-lined box measuring 15x15x15 inches.
Installation Notes
- Professional installation recommended.
- Drain and inspect OEM differential housing before install.
- Includes all necessary gaskets and hardware for direct fit into STI front diff.
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2002-2007 | Subaru | Impreza | WRX STI GDB |
| 2004-2007 | Subaru | Impreza | WRX STI |
| 2007 | Subaru | Impreza | WRX STI Limited |
| 2007-2011 | Subaru | Impreza | WRX STI GRB |
| 2008-2014 | Subaru | Impreza | WRX STI GVB |
Why Choose Cusco?
- Trusted by rally teams worldwide for durable drivetrain components.
- Hand-assembled in Japan with strict quality controls.
- Proven in D1GP and Super Taikyu racing series.
Frequently Asked Questions
- Q: Does this fit 2004-2007 USDM STI models?
A: Yes direct fit for GDB chassis Impreza WRX STI 2004-2007 including Limited edition with 10.5-inch front diff. - Q: What material are the internals?
A: Forged chromoly steel gears and high-friction clutch plates built for high torque and heat resistance. - Q: What is the warranty and install process?
A: 1-year manufacturer defect warranty. Install takes 4-6 hours with standard tools and diff drop.
Shipping & Handling
- Method: UPS Ground or FedEx
- Availability: In stock – ships same or next business day
- Packaging: Secure double-boxed 15x15x15 inches
- Weight: 25 lbs shipped
Reviews
There are no reviews yet.