1957-79 V8 Small Block Exhaust Manifold Heat Riser, Without Valve

Restore proper exhaust flow and cold-start performance with this reproduction exhaust manifold heat riser for GM small block V8 engines. Designed for 1957-79 models, this unit mounts between the exhaust manifold and exhaust pipe to help regulate heat during engine warm-up. Ideal for applications originally equipped without a heat riser valve.

• Reproduction exhaust manifold heat riser for GM small block V8 engines
• Correct for 1957-79 Chevrolet and GM models
• Without valve configuration for specific factory applications
• Helps improve cold engine drivability and intake manifold heat control
• Heavy-duty stamped steel construction for long-lasting durability
• Direct fit for easy installation between manifold and exhaust pipe

• GM part number: 3750067
• For use on small block V8 engines
• Ideal for restoration or maintenance applications

• Inside diameter of curved edges: 1-7/8"
• Inside diameter of straight edges: 1-3/4"
• Inside diameter of round side: 2-1/8"

Note: Images are shown from the bottom (pipe) side.