SKU: 666 561 ALHD
Cusco BCS Brake Cylinder Stop for 2002-2007 USDM Subaru Impreza WRX STI GDA GD Chassis
Cusco Brake Cylinder Stop BCS 666 561 ALHD locks the brake master cylinder on 2002-2007 USDM left-hand drive Subaru Impreza WRX STI GDA-B-C and GD chassis models. It stops cylinder rotation during hard braking and cornering to ensure steady pedal response and reliable stopping power. Bolt-on installation delivers instant gains for street or track driving.
Key Features
- CNC Machined Aluminum Construction: Lightweight 6061-T6 aluminum body weighs just 0.22 lbs for strength without added unsprung mass
- Anodized Finish: Black anodizing resists corrosion from track abuse and road salt
- Direct Bolt-On Fit: Designed for GDA-B-C WRX STI and compatible Impreza models with zero modifications
- Master Cylinder Stabilization: Locks position under high G-forces to hold brake pressure and pedal firmness
- LHD USDM Specific: Built for left-hand drive North American Subaru Impreza platforms
Product Notes
- Pair with Cusco brake pads and lines for full system synergy
- Clean mounting surfaces before installation for secure torque
- Ships in protective foam-lined box measuring 5 x 3 x 2 inches
Installation Notes
- Professional installation recommended.
- Remove OEM rubber stopper and torque new BCS to 10-12 Nm
- Compatible with factory and aftermarket master cylinders on listed models
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2004-2007 | Subaru | Impreza | WRX STI |
| 2007 | Subaru | Impreza | WRX STI Limited |
| 2006-2007 | Subaru | Impreza | WRX TR |
| 2006-2007 | Subaru | Impreza | 2.5i |
| 2002-2004 | Subaru | Impreza | Outback |
| 2005-2007 | Subaru | Impreza | Outback Sport |
| 2002-2005 | Subaru | Impreza | RS |
| 2002-2004 | Subaru | Impreza | TS |
| 2002-2007 | Subaru | Impreza | WRX |
| 2006-2007 | Subaru | Impreza | WRX Limited |
Why Choose Cusco?
- Proven in Super Taikyu and rally racing worldwide
- High-strength materials tested for endurance
- Exact OEM-spec tolerances from Japanese engineering
Frequently Asked Questions
- Q: Will this fit my 2004 Subaru Impreza WRX STI hawkeye?
A: Yes, Cusco 666 561 ALHD BCS fits 2002-2007 GD/GDA chassis WRX STI including USDM hawkeye models with LHD - Q: What material is the BCS made from?
A: Precision CNC machined from 6061-T6 aluminum with black anodized finish for strength and corrosion protection - Q: Is installation DIY friendly and what tools are needed?
A: Bolt-on replacement takes 15-30 minutes with basic tools like 10mm socket, torque wrench, and brake cleaner. no special hardware required
Shipping & Handling
- Method: UPS Ground or USPS Priority
- Availability: In stock – ships same or next business day
- Packaging: Compact box 5 x 3 x 2 inches
- Weight: 0.22 lbs
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