Chevy BBC 454 Nostalgic Finned Aluminum Valve Covers - Tall w/o Hole It is designed to hold

It is designed to hold the amount of oil that is needed to lubricate the engine when it is running

They use silicon aluminum bi-metal construction

This is a preloaded unit allowing for a faster-reacting unit

Convert any one-piece GM TH400 case into a two-piece case with our Speedmaster TH400 case adapter

O-ring seal is included

Chevy BBC 454 Nostalgic Finned Aluminum Valve Covers - Tall w/o Hole It is designed to holdDo you want to finish off your engine in style? Try a set of these Speedmaster finned aluminum valve covers. They are manufactured from cast aluminum and have a polished finish. Speedmaster finned aluminum valve covers feature a classic raised, finned design that adds a unique look to your engine. If you don't want any breather holes drilled, no problem they are offered with breather holes or without any holes. Speedmaster finned aluminum valve covers