Allstar Performance Residual Check Valve - 10 lb. YA0828MM04 install the threaded insert onto

install the threaded insert onto the mandrel

1990-2001 Chevrolet Lumina

Fits SA2010 K

Stilo WRC DES/Trophy/ST4F/ST4W

Allstar Performance Residual Check Valve - 10 lb. YA0828MM04 install the threaded insert ontoResidual check valves hold a small amount of pressure in the brake system to keep the brake system functioning properly while helping to maintain a firm pedal. Maintaining system pressure prevents fluid from returning to the master cylinder when the master cylinder is positioned lower than or close to the same height as the calipers or wheel cylinders. Proper system pressure also keeps piston and wheel cylinder seals expanded, creating a positive seal