Cyl Kit,4" Bore,4" Stroke,100",WBlk,99-06 bt

88" engines are boosted to 100" Cast Ductile Iron Sleeve in cast aluminum for superior heat transfer Bolt in - no machining, balancing or splitting the crankcases; install can be performed with engine still in frame Complete kit includes cylinders, forged pistons, rings, piston pins, clips and gaskets 10.5:1 compression (w/ stock 85cc heads) makes for a very streetable and dependable engine that also responds well to performance cams 96" and 103" engines are boosted 110" Not for use with S&S 79cc heads.