Chevy SBC 350 Round Port Copper Exhaust Gasket Set By using an aggressive lobe

By using an aggressive lobe profile

it's just that simple

They accurately measure camshaft centerline

most include a drain plug for easy fluid changes

They also help to insulate the carburetor from engine heat and provide clearance for linkages

Chevy SBC 350 Round Port Copper Exhaust Gasket Set By using an aggressive lobeThese Speedmaster exhaust gaskets are made from thick copper, and feature an embossed ridge around the exhaust port for a tight, leakproof seal. The copper gaskets help even out the flow between the head and header flange to minimize warping. Also, they'll conform to rough or irregular surfaces to maintain a positive seal, while keeping the header bolts tight.