This Big Bore kit (29904-07) lets you increase the displacement of your Twin Cam 96-equipped model from 96 Cubic Inches (1584cc) to 103 cubic inches (1690cc). Includes big bore cylinders, big bore flat top pistons, rings, clips, and a Stage 1 air cleaner kit with one piece backplate, integral breathers, all mounting hardware, and gaskets. A high performance clutch spring is included to provide the additional clutch capacity required by the extra power. Requires separate purchase of primary cover gasket. This kit is street legal when used with stock mufflers. All models require ECM calibration.
Fits: ‘07 Twin Cam equipped models.
New obsolete part.
