The Chevy Orange Center-Bolt Valve Covers are for Chevy Small Block Gen II Engines (305-350 Engines; 1987-pre-LS). Made from stamped steel, they are 20% thicker than typical aftermarket valve covers. They are manufactured to GM specifications, equipped with GM-designed baffles. Short (production height) style, and featuring the Ribbed Bowtie Design in black. Not supplied with mounting hardware, your existing stock hardware is recommended. Sold in pairs.