Vtwin 107 Twin Cam Black Cylinder 10.5:1 Piston Big Bore Kit for 2000-06 Harley. Piston Size: 4.1225 Cylinder Size: 4.125" Cylinder Height: 5.912".
TC-88 Big Bore cylinder kit includes forged 10.5:1 piston kit and black cylinders. This kit requires case machining. Cylinder kit measures 0.993 length of the sleeve fits into crankcase.
Cylinders have a 4-1/8" bore and fit a 4" stroke. Total length is 5.912. Order top end gasket kit separately. The outside diameter of the bottom portion of the sleeve is 4.295.