74" 3-7/16" Bore Cylinder and High Compression Piston Kit for 1966-'78 74" HD® Big Twins - Gloss Black Finish SPEAKER LIDS- BAD DAD TOURING You have selected the MRI

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74" 3-7/16" Bore Cylinder and High Compression Piston Kit for 1966-'78 74" HD® Big Twins - Gloss Black Finish SPEAKER LIDS- BAD DAD TOURING You have selected the MRIThis kit is intended to replace the cylinders and pistons of a 74" shovelhead engine and increase the compression ratio to 9: 1. Compatible with stock or S&S cylinder heads. Kit includes S&S 3 7 16" bore high tensile cast iron cylinders, 3 7 16" bore forged high compression pistons for 74" (3 31 32" stroke) engines with rings and wristpins, head gaskets, S&S stainless steel head bolts with washers, base nuts, base gaskets