Allstar Performance Residual Check Valve - 2 lb. Radiator Cap Ford Fullsize Truck 1999-2004

Ford Fullsize Truck 1999-2004

improved idle quality

15 in H x 18 in W Jig-built For Consistency

Temperature and timer settings

and (2) high-flow -3 ORB to -4AN fittings

Allstar Performance Residual Check Valve - 2 lb. Radiator Cap Ford Fullsize Truck 1999-2004Residual 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