Harley-Davidson Screamin’ Eagle Round High Flow Air Cleaner – Center Bolt 29400355

The Screamin’ Eagle® High-Flow Air Cleaner Kit provides increased airflow to boost the power of your Milwaukee-Eight® engine equipped model. The one-piece cast back plate is system-matched to the throttle body to deliver a smooth uninterrupted flow, and shaped to permit air to enter around the entire perimeter of the air cleaner housing. The back plate is topped with a washable perimeter-flow oiled-cotton filter element that captures debris while passing significantly more air than the stock filter. Harley-Davidson Screamin’ Eagle Round High Flow Air Cleaner – Center Bolt 29400355

• Round – Center Bolt

• Dress with available round Original Equipment or accessory center-bolt air cleaner covers (sold separately)

• Choose to flaunt your performance gains with the open element look, and finish it off with custom Air Cleaner Trim from one of the Harley-Davidson decorative collections

• Includes air cleaner element, gloss black back plate, breather and all required hardware

• Optional Rain Sock P/N 29400363 is available to protect the exposed element in inclement weather

Fits ’18-later Softail® and ’17-later Touring (except ’23-later FLHXSE, FLTRXSE, ’24-later FLHX and FLTRX) and Trike models. ’17-later Touring and Trike models require separate purchase of accessory round air cleaner cover or trim. Not compatible with air cleaner cover on CVO™ Touring models. All models require ECM calibration with Screamin’ Eagle® Pro Street Tuner or dealership installed Screamin’ Eagle calibration for proper installation. Harley-Davidson Screamin’ Eagle Round High Flow Air Cleaner – Center Bolt 29400355

Harley-Davidson Screamin’ Eagle Round High Flow Air Cleaner – Center Bolt 29400355

The Harley‑Davidson Screamin’ Eagle Round High‑Flow Air Cleaner – Center Bolt (Part # 29400355) is a performance‑focused intake upgrade engineered to improve airflow and enhance throttle response on compatible Milwaukee‑Eight‑equipped Harley‑Davidson motorcycles. It is part of the Screamin’ Eagle performance lineup, designed to boost engine breathing compared to the stock air cleaner, making it a popular choice for riders pursuing a Stage I upgrade that balances performance gains with classic custom style. (Harley-Davidson) Harley-Davidson Screamin’ Eagle Round High Flow Air Cleaner – Center Bolt 29400355

At the core of this kit is a one‑piece cast back plate that is precision‑matched to the throttle body to provide a smooth, uninterrupted path for incoming air. The back plate’s shape allows air to enter around the entire perimeter of the air cleaner housing, maximizing air intake potential. This design, when paired with the included high‑flow washable perimeter‑flow oiled‑cotton filter element, lets significantly more air enter the engine compared to the stock filter — contributing to improved combustion efficiency, stronger throttle response, and potential performance gains when the engine’s air‑fuel delivery is optimized. (Harley-Davidson) Harley-Davidson Screamin’ Eagle Round High Flow Air Cleaner – Center Bolt 29400355

Because the kit features a round center‑bolt mounting design, it accepts a variety of Harley‑Davidson OE and accessory round center‑bolt covers (sold separately). This flexibility allows riders to customize the look of their intake system, whether they prefer the open exposed element for a raw performance aesthetic or want to finish the assembly with decorative covers or trim from Harley‑Davidson’s Air Cleaner Trim Collection. (Harley-Davidson) Harley-Davidson Screamin’ Eagle Round High Flow Air Cleaner – Center Bolt 29400355

The kit includes the air cleaner element, gloss black back plate, breather, and all required mounting hardware. An optional rain sock (P/N 29400363) is available to help protect the exposed filter from moisture and debris when riding in wet weather, though regular cleaning and maintenance of the filter are still recommended to maintain optimum airflow. (Harley-Davidson) Harley-Davidson Screamin’ Eagle Round High Flow Air Cleaner – Center Bolt 29400355

Fitment for Part # 29400355 covers ’18–’24 Softail® models and ’17–’25 Touring and Trike models with some exceptions for specific configurations and model years. ’17‑later Touring and Trike models typically require the separate purchase of an accessory round air cleaner cover or trim. This kit is 50‑State U.S. EPA compliant, making it street legal in all U.S. states when installed according to Harley‑Davidson guidelines. However, all EFI‑equipped bikes need an ECM calibration using a Screamin’ Eagle Pro Street Tuner or a dealer‑installed calibration to ensure the air‑fuel ratio stays within proper limits and the engine runs smoothly. (Harley-Davidson) Harley-Davidson Screamin’ Eagle Round High Flow Air Cleaner – Center Bolt 29400355

Overall, the Screamin’ Eagle Round High‑Flow Air Cleaner – Center Bolt offers a balanced combination of increased airflow, tunable performance potential, and custom styling options, making it a solid choice for riders looking to boost the performance and visual presence of their Milwaukee‑Eight motorcycle without extensive modification. (Harley-Davidson) Harley-Davidson Screamin’ Eagle Round High Flow Air Cleaner – Center Bolt 29400355