Chevy BBC 396 454 Copper Exhaust Gasket Set Leaks can lead to the

Leaks can lead to the death of your rear end

The Speedmaster valve locks will fit any Speedmaster 10 degree retainer and are recommended for all race applications due to their superior strength

They feature less than

or choke control in the way

Chevy BBC 396 454 Copper Exhaust Gasket Set Leaks can lead to theThese 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.