CNC machined from 6061 T-6 aluminum alloy. This is an new design made to fit the increased rocker arm area of the new Strip Dominator head. Extra deep, with 2-1/4" rocker clearance. Machined for an "O" ring seal so you will never have to replace a leaky paper gasket, like other similar types of valve covers. This new MP-15 "O" ring material uses micro-pore technology that allows the material to retain strength with low torque retention. Black anodized finish with engraved CB Performance Speed Shop Logo.