1964-78 Small Block Exhaust Manifold Heat Riser Valve

The heat riser valve is located between the exhaust manifold and the head pipe and is used to hasten the warm-up of a cold engine. Malfunctioning or frozen valves can cause loss of power or exhaust manifold damage.

1967-1978 Chevrolet Camaro
1964-1973 Chevrolet Chevelle
1964-1968 Chevrolet Chevy II Nova
1964-1978 Chevrolet Impala