303 Stainless steel domed head engine bolt set for august 1926 to end of production in 1927. 13 piece set which includes; 2 water inlet bolts, 2 water outlet bolts, 2 front motor mount bolts, 1 Generator bracket mounting bolt, 4 Manifold Mounting bolts, 2 Valve Cover Bolts. Originally these were nickel plated steel bolts but are now offered in stainless steel.