66-84 FL Shovel, 71-84 FX Shovel, 85-94 FX Model, 91-98 Dyna, 84-99 Softail, 86-98 Touring, 86-20 Sportster
Note: For 3.475" up to 4.00" Bore
Required to accurately bore late-model aluminum cylinders. Simulates stress deformation of installed cylinder. Drilled for multiple applications up to a 4"-bore. The plates for Twin Cam 88 models also fit Screamin‘ Eagle big bore cylinders. Optional bolts are available for use with Evolution Sportster and Buell cylinders.