Holley's LS valley covers with oil fill provisions are the latest addition to our expansive lineup of LS engine dress up products. Machined from billet aluminum and featuring a modern trussed design with an integrated oil fill neck and billet oil fill cap. These LS valley covers are the perfect upgrade for your LS engine if you are looking for a subtly custom touch. These valley covers are machined smooth on the underside eliminating Displacement-On-Demand (DOD) and instead feature ample gasket sealing surface and provisions for re-installing the oil pressure sensor if necessary. Each valley cover is custom machined for either LS1/LS6 (10 bolt) or LS2/LS3/LS7/LSX (11 bolt) patterns and Holley / Mr. Gasket offers all the necessary gaskets and upgraded hardware options to complete your installation. The new LS valley covers with oil fill provisions are available in three unique finishes: natural billet (clear anodized for protection) / polished billet/ black anodized billet.