This Screamin' Eagle 55mm Extreme-Flow Intake Manifold features enhanced , 55mm , air-guzzling geometry and hand-polished intake runners to provide uninhibited airflow to the engine resulting in a 2% - 4% increase in horsepower that you will notice. •Cast-aluminum construction withstands sustained high-engine temperatures for reliability even under the harshest riding conditions • Fits the stock throttle body and all Screamin' Eagle Intake Kits • Works with all current Screamin' Eagle Pro Street Tuner calibrations • All models require ECM calibration with Screamin' Eagle Pro Street Tuner for proper installation •50-State U.S. EPA compliant
'Fits ' 18-later Softail and '17-later Touring (except '23-later FLHXSE and FLTRXSE) and Trike models. All models require ECM calibration with Screamin' Eagle Pro Street Tuner or dealership installed Screamin' Eagle calibration for proper installation. Pending approval for use in California on '21 models. Refer to H-D.com/shop for status.