S&S stroker kits have always been the most effective way to boost the power of a V-Twin engine. That was true in 1961, when S&S started selling strokers and it is still true today. The 106CI (1,740cc) Stroker Set Up for Twin Cams delivers real performance gains at a reasonable price, and does not require any crankcase modifications. The 4 1/2" stroke flywheels and 3 7/8" bore pistons boost the displacement of a stock Twin Cam 88 engine to 106CI (1,740cc), using your stock cylinders that have to be bored out. Alternatively we also have ready to install 3 7/8" bore cylinder and piston kits available. Engines with a Screamin' Eagle 95CI kit fitted require piston fitting only. Installation in 2003 thru 2006 engines requires the seperate purchase of a ZPN 231697 crankshaft bearing assembly.