Quick view Subaru FHI Subaru Brake Master Cylinder fits 2002-07 WRX, 04-07 STI $249.92 A malfunctioning brake master cylinder in your Subaru WRX and STI can exhibit either an external brake fluid leak or an internal leakage. In both cases, these issues lead to a compromised brake system, manifesting as a spongy brake pedal and diminished... Add to Cart Add to Cart Add to Wish List Add to My Wish List Create New Wish List