S&S Cycle HOT Set Up Kit, Big Bore, 106", With O Heads,w/Cylinders Pisto

Increase bore size from 3.750" to 3.927"

4 3/8" stroke, 10:1 compression with stock heads

Easy installation; no machining or rebalancing required

Forged coated pistons are compatible with stock or S&S Super Stock 79cc and 89cc heads

Valve pocket recessed in S&S pistons are enlarged for oversize valves and higher lift cams

11 fins and full fin pattern on cam side of cylinders closely resembles OEM shape

Kit includes; S&S cylinders with gaskets, piston set with rings, top end gasket kit, pushrods, tappets, 585CE chain-drive easy start cams and instructions

A fuel system is not included

Made in the U.S.A.

Increased fin area for better heat dissipation