About this item Aluminum Valve Cover Oil Cap Breather for LSX LS1/LS2/LS3/LS6/LS7, suitable for most LSX engines! This is a new aftermarket valve cover oil cap with venting holes designed to protect the engine from dust and impurities while improving performance. Made from solid billet aluminum, it is resistant to corrosion and rust. CNC-machined from billet aluminum for a precise fit, the included silicone O-ring helps prevent oil seepage at the base of the adapter. The top of the adapter is designed to accept a 10AN hose end, facilitating the installation of a custom crankcase evacuation system, PCV system, or for use with a vacuum pump. The respirator features pre-treated cotton/gauze filter elements that protect your engine and allow it to breathe freely. Package Dimensions: 3.43 x 3.35 x 2.87 inches.