1958-74 Chevrolet V8 Big Block; Exhaust Manifold Heat Riser With 2-1/2" Headpipe Without Valve
Replacement heat riser "blank" plate for improved flow. Note: Images are shown from the bottom (pipe) side.
1957-79 V8 Small Block Exhaust Manifold Heat Riser, Without Valve
Stock replacement heat riser valves are available as well as "blank" plates for improved flow. {specs} Note: Images are shown from the bottom (pipe) side.