KITS FOR 2007-UP TWIN CAM® ENGINES Factory 2007-up Twin Cam® engines are equipped with 4-3/8” stroke crankshafts. The factory cylinder bore size of 3-3/4” yields the 96” displacement, which was gradually increased to 3-7/8” starting in 2010 for 103” displacement. Brand new Big Bore 45mm cylinder/piston kit. Fits Husqvarna chainsaw models 346, 346XP, 350, 351, 353. This is a high quality chrome plated cylinder kit that comes with a FULL 1 YEAR FREE REPLACEMENT WARRANTY! Ford Engine Kit - Ford 428 Stroker Kit, 351 Windsor Big Bore Reverse Dome, at GREAT Prices, Selection, Customer Service, and Low Shipping Rates All From COAST HIGH PERFORMANCE We offer several bolt-on and monster big bore kit solutions for the twin cam engine family. Click on the displacement below for more information about each kit: Revolution Performance 107" Bolt-On Big Bore Kit (Fits 2006-2016 96" Twin Cam style and 103" motorcycles) $1089.95. The Revolution Performance 107" Twin Cam Bolt-On Big Bore Kit is the most reliable way to increase power and torque on your 2006-2016 96" Twin Cam engine.