Valve Cover Grommets are designed for all Aftermarket Steel Valve Covers with 1-1/4 inch rolled in filler-breather holes. These replacement grommet kit includes one 1-1/4 inch by 3/4 inch inside diameter and one 1-1/4 inch by 1 inch grommet, and suit Oil Cap Part Number 66-012 and Pcv Valve Part No 4297 or 4298.