S&S Cycle
S&S Cycle 66-84 BT 3-31/32in Stroke 3-7/16in Bore 9.0 To 1 Compression Cylinder Kit - Gloss Black
S&S Cycle 66-84 BT 3-31/32in Stroke 3-7/16in Bore 9.0 To 1 Compression Cylinder Kit - Gloss Black
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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.
Genuine S&S Cycle. Part number 91-9012.
Ships from US warehouse.
Note: Not CARB approved — not for sale or use on pollution-controlled vehicles in California.

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