Big Bore Kit

S&S Cycle #910-0642 - 4" Big Bore Bolt-In Sidewinder® Cylinder Kit - 100" - Silver

Not recommended for trike models.FeaturesBolt in - no machining, balancing or splitting the crankcases; install can be performed with engine still in frameCast Ductile Iron Sleeve in cast aluminum for superior heat transfer88" engines are boosted to...

S&S Cycle #910-0646 - 4" Big Bore Bolt-In Sidewinder® Cylinder Kit - 100" - Black

Not recommended for trike models.FeaturesBolt in - no machining, balancing or splitting the crankcases; install can be performed with engine still in frameCast Ductile Iron Sleeve in cast aluminum for superior heat transfer88" engines are boosted to...

S&S Cycle #910-0650 - 4" Big Bore Bolt-In Sidewinder® Cylinder Kit - 110" - Silver

Not recommended for trike models.Not for use on Twin-Cooled models.FeaturesBolt in - no machining, balancing or splitting the crankcases; install can be performed with engine still in frameCast Ductile Iron Sleeve in cast aluminum for superior heat...

S&S Cycle #910-0651 - 4" Big Bore Bolt-In Sidewinder® Cylinder Kit - 110" - Black

Not recommended for trike models.Not for use on Twin Cooled models.FeaturesBolt in - no machining, balancing or splitting the crankcases; install can be performed with engine still in frameCast Ductile Iron Sleeve in cast aluminum for superior heat...