Proform SBC Chrome Bowtie V/C's - Tall w/o Baffle. These CHEVROLET Bowtie valve covers are made of heavy-gauge steel, 20% thicker than typical aftermarket valve covers, greatly reducing the likelihood of leakage around the valve cover flange area caused by fasteners being over-torqued. The chrome plating meets GM quality specifications. All valve covers bear the powerful Bowtie and CHEVROLET Emblems. Stamped valve covers are offered in either tall or production height (short). Oil restricting baffles are offered in many valve covers for those who wish to maintain the PCV hookup. Technical Note: Production height Chevy small-block valve covers and valve covers with baffles will not clear most stud girdle applications. Chevy Small Block 262 to 400 Engines 1959 to 1986. Chev sm-blk valve covers & valve cover w/baffle will not clear most stud girdles. Refer to the compatibility chart for details.