FORD 351C 351M 400M VALVE COVER STUD KIT BOLTS STAINLESS STEEL BOSS 302 351 - Bolt kit for Installing the Valve Covers to Cylinder Heads - Fitment: Fits 351 Cleveland, 351 / 400 M-Block, BOSS 302 / 351 Ford Engines; Fits Most OEM & Aftermarket Stamped Steel & Aluminum Perimeter Bolt Valve Covers. - Specifications: Hardened 304 Stainless Steel; (16) 1/4" x 1 1/2" Studs (polished); (16) 1/4" Hex Locking Flange Nuts (polished).