Chevy BBC 454 Black Finned Aluminum Valve Covers - Tall w/ Hole An engine with a 4340

An engine with a 4340 billet steel crankshaft will rev faster and cleaner due to the different harmonics produced from the high grade material

and the nipple pilot prevents damage to the inner tube

They're available in a variety of styles

000 psi tensile strength for the utmost in reliability

Chevy BBC 454 Black Finned Aluminum Valve Covers - Tall w/ Hole An engine with a 4340Do 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 powedercoated black 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