BOLT-IN SIDEWINDER® 4" BIG BORE KITS FOR HARLEY-DAVIDSON

S&S CYCLE BOLT-IN SIDEWINDER®​ 4" BIG BORE KITS FOR HARLEY-DAVIDSON Silver Bolt-In Sidewinder® 4" Big Bore Kit Bolt in - no machining, balancing, or splitting the crankcases; install can be performed with engine still in frame

Cast Ductile Iron Sleeve in cast aluminum for superior heat transfer

88" engines are boosted to 100"

96" and 103" engines are boosted to 110"

10.5:1 compression (w/ stock 85cc heads) makes for a very streetable and dependable engine that also responds well to performance cams

Complete kits include cylinders, forged pistons, rings, piston pins, clips and gaskets

Available with wrinkle black or silver powdercoat finish cylinders

BOLT-IN SIDEWINDER®​ 4" BIG BORE KITS

NOTE: Not for use with S&S 79cc heads.