Duramax AFE 79-12002 Billet Engine Oil CapThis aFe oil cap gives styling a whole new aspect. Machined from durable CNC 6061-T6 billet aluminum for maximum strength and durability. This oil cap features eye-catching black chrome screws and a flawless matte black finish. Equipped with a new o-ring style gasket. This cap ensures a leak free seal while enhancing the look of your engine compartment. This billet aluminum oil cap is truly a quality addition to any engine.