These Chevrolet Bowtie valve covers are made of heavy-gauge steel, 20 percent thicker than typical aftermarket valve covers, greatly reducing the likelihood of leakage around the valve cover flange area caused by fasteners being over-torqued. All valve covers bear the powerful Bowtie Emblems. These stamped valve covers are offered in short height. Oil restricting baffles are offered in these valve covers for those who wish to maintain the PCV hookup. All valve covers are sold in pairs, equipped with air breather and PCV grommets, unless specified otherwise. Technical Note: Production height Chevy small-block valve covers and valve covers with baffles will not clear most stud girdle applications. Fits Chevy small-block engines 1987 to current.