S&S Cycle Cylinder - Evolution Big Twin - Wrinkle Black - Highlighted Fins 91-7710

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...

Huge displacement increase means huge power increaseWorks with stock crankcasesOriginal engine serial numbers are retainedPowder coat finish matches factory finish045" MLS (multi-layered steel) head...

Huge displacement increase means huge power increaseWorks with stock crankcasesOriginal engine serial numbers are retainedPowder coat finish matches factory finish045" MLS (multi-layered steel) head...

Bolt-on cylinder setFor 4.375" stroke motorsMade in the U.S.A.