Our Bolt-On Big Bore kits for Harley-Davidson® Twin Cam engines have not only proven themselves on the dyno but in the real world also! Tired of the headache of trying to piece together engine packages that may or may not work the way you planned? We have done the research for you and even packaged the proper components at significant savings over buying them separately!

For the really BIG horsepower numbers, Stage 3 kits are available in bigger bore sizes. These kits are custom tailored to your needs and budget so call for details.

124 cid Power Packages Throttle body, lifters and roller rocker arms not included. When ordering call us at 866-892-2109 to clear up any questions and provide us with details about your bike. This will aid us in giving you proper porting. Our sales staff will also follow up online orders with a phone call to make sure everything goes smoothly for you. Buy Online or Call today toll-free 1-866-892-2109!

CHAIN DRIVE PACKAGES 06-up Twin Cam Stage 2 124" Chain Drive Package Customer supplied cylinder heads Throttle Body, roller rocker arms, lifters not included TC Stage 2 Cylinder Heads TC 124 cid Cylinder-Piston Kit TR662-1 Chain Drive Cams Precision™ EMS Kit 99-up TC Adjustable Pushrods Twin Cam Quick Install Lower Tubes 99-up Twin Cam Top End Gasket Kit Black Highlight, Black or Silver $3247.64 06-up Twin Cam Stage 3 124" Chain Drive Package Customer supplied cylinder heads Throttle Body, roller rocker arms, lifters not included TC Stage 3 cylinder head porting TC 124 cid Cylinder-Piston Kit TR662-2 Chain Drive Cams Precision™ EMS Kit 99-up TC Adjustable Pushrods Twin Cam Quik Install Lower Tubes 99-up Twin Cam Top End Gasket Kit Black Highlight, Black or Silver $3497.64