Chevy SBC 350 Oval Port Copper Exhaust Gasket Set they utilize a cotton gauze

they utilize a cotton gauze with aluminum mesh construction

however this kit comes complete with the return spring assembly and brackets

Installing a Speedmaster oil restrictor kit will limit this unnecessary oil flow

It has bendable locking tabs and comes with special high-strength bolts

The use of 6 pinion gears means the stress on gears is spread over a greater surface area

Chevy SBC 350 Oval Port Copper Exhaust Gasket Set they utilize a cotton gauzeThese 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.