The Power Package is the ideal combination of performance and savings to transform your Twin Cam HD without breaking the bank. Bump the early Twin Cam from 88 to 100ci as well as adding matched cams/plate/pump and everything else a high performance cam chest needs to reliable make big power. Largest big bore kit available without crankcase mods. Upgrade TC88 to 100 cu inches, Cylinders fit to pistons- No machining required. All parts required to upgrade to gear drive cam or hydraulic tensioners in one easy to order part number. Engineered package to deliver the best bolt in performance. 4" Bore bolt on cylinder and piston kit. 10.5:1 Compression Silver or Black Available S&S 585 Easy Start Cams in either gear or chain version, TC3 Oil Pump, TC3 Cam Plate, S&S cam chain tensioners or outer cam drive gears depending on selection Quickee Adjustable Pushrods with Tubes S&S Premium Tappets All Required Bearings and Gaskets 4" Bore bolt on cylinder and piston kit Cylinders fit to pistons- No machining required All parts required to upgrade to gear drive cam or hydraulic tensioners in one easy to order part number Buy the parts together and save money ( approx $400-$440) Engineered package to deliver the best bolt in performance available