S&S T143 Long Block Engine With Easy Start Camshafts For Harley If you want to build the baddest bike on the block, you need a T143! The S&S T143 Long Block engine is the largest S&S engine that will fit in a stock Harley- Davidson chassis. At double the HP of a stock motor the power of the T143 requires technical expertise for the installation and tuning along with an experienced rider. This is an ultra performance/race engine. Longevity, engine noise, vibration and throttle sensitivity have all been compromised to reach this level of performance while fitting in a stock chassis and as such is not suitable for every situation. Features: S&S Cycle Super Stock crank cases with reed breather valve S&S Cycle B3 cylinder heads CNC machined with 2 bolt exhaust flanges S&S Cycle 3 Piece Flywheels S&S Cycle TC3 cam plate and oil pump S&S Cycle 635 Easy Start gear drive cams S&S Cycle 1.725:1 rocker arms for .674 total lift S&S Cycle Premium High Performance Tappets Requires S&S Cycle Super G or Super D carburetor kit, sold separately Requires high performance ignition system, sold separately 1 Year Warranty Made in the USA Note: The S&S T143 engine comes with S&S B3 Special Application cylinder heads. Due to the unique exhaust port configuration, stock exhaust pipes will not fit. You ca either use the S&S Cycle T143 Exhaust Flange Starter Kit to adapt existing 2 headers or fabricate a whole new system.