S&S T143 Long Block Engine With Easy Start Camshafts For Harley The S&S T143 Long Block engine stands as the pinnacle of power for Harley-Davidson motorcycles, crafted for those aiming to push the limits of performance within a stock chassis. This powerhouse doubles the horsepower of standard motors, demanding expertise in both installation and tuning. Tailored for performance enthusiasts and seasoned riders, the T143 is an ultra-performance race engine that sacrifices longevity, engine noise, vibration, and throttle sensitivity to achieve unmatched power, warranting consideration for its fit in specific biking scenarios. 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 high performance ignition system, sold separately Requires S&S Cycle Super G or Super D carburetor kit, sold separately Requires S&S Cycle Oil Line Kit and S&S Cycle Transmission Drill Fixture , 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.