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S&S 74" 3-7/16" Bore Cylinder and High Compression Piston Kit for 1966-'78 74" HD Big Twins - Gloss Black Finish

This 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

Instructions Link (Click Here)

Manufacturer: S&S Cycle

Part #: 91-9012

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S&S Cylinder Kit 91-9012

  • Brand: S&S Cycle
  • Product Code: 91-9012
  • Availability: Special Order
  • $2,295.95


Tags: S&S Cycle, Harley Davidson, Classic Pre-1984, Engine, Cylinder