S&S CYCLE 4-1/8" Bore Cylinder — 4-5/8" stroke, fits '99-'17 Twin Cams – 07-17 Dyna, 07-16 Touring, 07-17 CVO, 09-16 Trike, 07-17 Softail
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Cylinders with a stock bolt pattern, bored slightly under nominal size and left un-honed; designed for 124" hot set up kits and '99-'17 Twin Cams. Requires crankcase machining.