SBC Valve Cover Bolts Stainless Steel Kit Small Block Chevy 283 327 350 383 400 - Bolt Replacement for Installing Valve Covers to Cylinder Heads - Fitment: Fits (1955-1986) 265, 283, 302, 305, 327, 350, and 400 Small Block Chevy Engines; Fits Most OEM & Aftermarket Stamped Steel & Aluminum Perimeter Bolt Valve Covers; Will Not Fit: Aluminum Valve Covers with One-Piece Fel-Pro Gaskets; Will Not Fit: Center bolt Valve Covers; Will Not Fit: GEN II, III, IV, V Engines (TPI, LT1, Vortec 4.8 5.3 5.7 6.0 6.2L, LSX, LT5 Engines). - Specifications: Hardened 304 Stainless Steel; (8) 1/4" x 3/4" Allen Socket Head Bolts (semi-polished); (8) 1/4" Mil-Spec AN Washers (polished); Accepts 3/16” Allen Key / Allen Socket for Install.