The Billet Valve Cover is designed to deliver a perfect combination of durability, and performance for 6.7L & 5.9L Cummins engines. Precision-machined from aircraft-grade 6061-T6 aluminum, this valve cover features a sleek black powder-coated finish for added protection and a refined look. Equipped with a baffled breather system, it effectively minimizes blow-by, eliminating the need for a catch can in most applications. The kit includes a billet aluminum valve cover, stainless steel fasteners, a billet oil cap cover, a rubber plug kit for factory breather hoses, and a custom billet breather with a -inch hose. Manufactured by D&J Precision Machine, this premium valve cover is built to last while enhancing the style and function of your Cummins engine.