S&S CYCLE 4-1/8" Bore Cylinder — 4.125" bore, 4.625" stroke, fits 124" Hot Set Up Kits '99–'17 Twin Cam – 07-17 Dyna, 07-16 Touring, 07-17 CVO, 09-16 Trike, 07-17 Softail
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Stock bolt pattern; bored slightly under nominal and not honed; for 124" Hot Set Up Kits and '99–'17 Twin Cam; wrinkle finish with machined edges; made in the U.S.A.; crankcase machining required.