Cusco Brake Master Cylinder Brace (02-07 WRX/STI)

The Cusco Brake Cylinder Stopper is designed to reduce the unwanted flex of the brake master cylinder when the brakes are applied. Limiting this movement means that more of the force that you apply to the brake pedal is directly applied to the brake calipers, substantially improving pedal feel.

666 561 ALHD


Cusco USA is a division of Carrosser Co. Ltd, which is based in Japan. Cusco USA is the headquarters for market research, product development, sales and distribution in the Americas. Our headquarters are located in Huntington Beach, California. Cusco USA believes in operating a successful business based on respectable principles and incorporating them into company policies. Below will give you a look at our philosophy, which we believe affects the quality of products you receive.

The Cusco Brake Cylinder Stopper is designed to stablize the brake master cylinder. Upon hard braking, the sheet metal of the firewall to which the brake master cylinder is attached to, flexes immensely from hydraulic pressure and applied human pedal force. Works effectively with factory brake systems and or upgraded units. This modification will effectively result with improved brake feel and quicker pedal response.
This works well paired with Stainless Steel Brake Lines.

NOTE: the car pictured above is right-hand drive, and that your part will be the same item designed for the left hand drive vehicles.

Vehicle Fitment:

  • 2002-2007 WRX
  • 2004-2007 STI

warning_symbolWARNING: Operating, servicing and maintaining a passenger vehicle or off-road vehicle can expose you to chemicals including engine exhaust, carbon monoxide, phthalates, and lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. To minimize exposure, avoid breathing exhaust, do not idle the engine except as necessary, service your vehicle in a well-ventilated area and wear gloves or wash your hands frequently when servicing your vehicle. For more information go to

More Information
SKU 666 561 ALHD
Product Type Brakes
Brakes Master Cylinder Brace
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