Description
The product is a Chevrolet Small Block Exhaust Manifold Heat Riser Valve with manufacturer part numbers 3887023 and 3969903. It is designed for use in Chevrolet vehicles produced between 1965 and 1974. The valve is in gray color and serves the purpose of regulating heat in the exhaust system. This OEM part, with part number GM 3969903 HR9903, is essential for maintaining proper functioning of the exhaust and emission systems in the vehicle.







