S&S CYCLE Cylinders - 4.125" - Black 910-0401

Cylinders - 4.125" - Black Cylinders have a stock bolt pattern, Bored slightly under nominal size and are not honed, Designed for 124" Hot Set Up Kits used in '99-'17 Twin Cams, Wrinkle black finish with machined edges, Made in the U.S.A., Requires crankcase machining.