Screamin' Eagle® Vortex Extreme Flow Air Cleaner Kits allow free breathing and unobstructed airflow to your Milwaukee-Eight® engine. Your engine gets more air, and you can feel more power throughout the rev range. Designed specifically for models with fairing lowers where legroom is essential. Shaped to maximize air flow and power gain while allowing for knee range of motion while using the rear brake and floorboard Showcases all four pushrods of the Milwaukee-Eight powertrain Standard rain sock keeps water, dust, and debris from contacting your air filter - extra insurance when riding in the elements Full kit includes backing plate, air filter element, cover, rain sock, and all necessary mounting hardware Durable Black finish Fits '25-later Softail, '23-later Touring and '26-later Trike models with Center-Cooled Milwaukee-Eight engines. All models require ECM calibration with Screamin' Eagle® Pro Street Tuner for proper installation. California models '26 and earlier require P/N 29400548 or 29400549. ECM Calibration Required: Yes Sold Separately: Screamin' Eagle Pro Street Tuner Screamin' Eagle Stage Upgrade: Stage I In the Box: Backing plate, air filter element, cover, rain sock, mounting hardware, installation hardware