Allstar Performance Residual Check Valve - 2 lb. Rear Main Seal Adapter DEI has been a pioneer

DEI has been a pioneer in the automotive performance industry

8L EFI intakes: OEM

1980-1981 Jeep Cherokee

extinguishers with an O

1973-1974 Oldsmobile Omega

Allstar Performance Residual Check Valve - 2 lb. Rear Main Seal Adapter DEI has been a pioneerResidual 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