Holley Muscle Series Valve Covers - SB Chevy -Polished Finish - SB Chevy 4704323-10- L 1/8 NPT Boost Reference Port

1/8 NPT Boost Reference Port

vehicles may have other interfering components that may require modifications or moving of existing brackets

0-600 psi Gauge

Designed and Tested for 30% Higher RPM than Conventional Alternator

Holley Muscle Series Valve Covers - SB Chevy -Polished Finish - SB Chevy 4704323-10- L 1/8 NPT Boost Reference PortHolley is pleased to introduce their Muscle Series Small Block Chevy valve covers inspired by 1970's era GM factory L82 LT1 Z28 equipped engines. These valve covers are a continuation of Holley's Vintage Series valve cover line featuring a classic finned design and retro styling cues. Each set consists of one valve cover with a twist in oil fill knockout (oil fill cap included) and one with a recessed area to place an adhesive backed Holley emblem