S&S, Twin Cam Crankcase Boring Plate For Harley-Davidson

Used to bore cases, with stock cylinder base pattern, to big bore sizes; Note: Required spacers, 512839 for 86-03 XL and 512839 and 512841 for 84-99 Evo B.T., must be ordered separately Fits: 36-99 B.T.(EXCL. TC); 86-03 XL(NU) Units: KIT