S&S Cycle Cylinder - Evolution Big Twin - Natural Finish 91-7210

Stock replacement cylinders, 3.5" bore with cast-iron linerFor 80" or 89" enginesMade in the U.S.A.

Cylinder and piston kits contain S&S 3-1/2" bore (80") cylinders and forged pistons, rings, wrist pins, and head and base gasketsThe pistons included in kits are flat-topped cast pistons designed...

Cylinder and piston kit can be used to build 84", 86" or 88" stroker engines, or to replace the cylinders and piston in an engine with an existing S&S? stock bore kitIncludes 3.4375" bore high...

Heads come completely assembled with valve seats, valves, guides, seals, .590" lift valve springs, collars and valve keepersComplete kits also include rocker cover gaskets, head gaskets and...

S&S heads give great performance, and work with additional upgradesKits are fully assembled, and include stainless steel valves and high-lift springs (up to .640 lift)Intake manifold, pistons and...