S&S Cycle · New
S&S Cycle 66-84 BT 3-31/32in Stroke 3-7/16in Bore 9.0 To 1 Compression Cylinder Kit - Gloss Black
MPN 91-9012 · Store SKU ssc91-9012
Supplier stock checked 11/8/2026, 5:47:40 AM UTC. Adding a part does not reserve it.
Request a return within 30 calendar days after delivery. New parts must be unopened and unused.
Shipping & returns ↗This policy does not limit rights required by law.Free standard shipping on eligible parts orders of $100 or more. Oversized and freight items excluded. Fitment, taxes, availability and final totals are confirmed before payment.
Product details
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.
Manufacturer fitment & guides
Check 91-9012 against the manufacturer’s application information below.
A manufacturer application guide is not available for this listing. Request the exact application from JuiceBuilt before payment.
Part-specific notes
- Not CARB approved. Destination and intended-use restrictions must be checked before sale.
- Emissions acknowledgement required before purchase.
