These Billet Valve Covers for LS Engines feature OE-style gaskets and hardware for superior sealing, a -16AN oil fill port for easy filling, a breather location for dry-sump oiling systems and internal baffling for an optional 3/8" breather/vent line. The valve covers also have provisions for valve spring oil squirters to help cool valve springs and increase their life in endurance racing applications. A bright black anodized finish and stainless steel ARP fasteners offer a clean appearance. These work on all LS center bolt cylinder heads, engines with tall or shaft mount rocker arms and endurance applications requiring extra spring oiling.