Feuling Motor Company Air Filter
Representative Photo, actual item may vary
Representative Photo, actual item may vary
Representative Photo, actual item may vary
Feuling Motor Company Air Filters: Performance-Engineered for the American V-Twin
When it comes to unlocking the breathing potential of a Harley-Davidson engine, few names carry as much credibility as Feuling Motor Company. While Feuling is widely respected for deep-engine work — camshafts, oil pumps, and valve-train components — their air filter lineup reflects that same obsession with airflow science and precision manufacturing.
The BA Series Air Cleaner: Built Around Airflow Physics
Feuling's flagship air cleaner offering is the BA Series Air Cleaner Kit, a product that goes well beyond a simple filter swap. The BA air cleaner lengthens the intake runners and increases air velocity, delivering added volume for balanced dynamic flow. That engineering detail — longer runners for improved charge velocity — is the kind of thinking typically associated with purpose-built race engines, not bolt-on accessories.
The BA air cleaner features a high-flow billet aluminum velocity stack with optimal opening diameter, outer lip, and internal (ID) taper — geometry that smoothly accelerates incoming air and reduces turbulence before it reaches the throttle body. It also includes a high-flow 2.5" reusable air filter and a one-piece billet cage, and the one-piece design creates a clean look while easing installation.
A convertible backing plate offers optional cylinder head venting, with external race-only venting to atmosphere available separately. This adaptability makes the BA Series a practical choice for both street-legal builds and more aggressive performance configurations.
Fitment Across Harley-Davidson Platforms
Feuling's air cleaner lineup spans multiple generations of Harley-Davidson powerplants. Options are available for Evo Big Twin and Slim configurations , as well as M-Eight platforms, including 50-state CARB-compliant variants for both black and chrome finishes. Riders on Milwaukee-Eight Touring models, M8 Softails, and earlier Twin Cam platforms can all find a properly fitting BA Series kit. Cover choices include solid and clear options, with finishes in black or chrome to match a wide range of custom aesthetics.
Reusable Filters & Long-Term Value
A key feature across Feuling's air filter ecosystem is reusability. The BA Series replacement air filter element is washable and reusable , reducing long-term ownership costs and keeping performance consistent over time. Feuling also offers a rain sock for RS Air Cleaners , providing weather protection without sacrificing airflow for riders who encounter unpredictable conditions. For maintenance, a dedicated air filter oil and cleaner kit is available to service the filter elements properly.
Why Feuling's Approach to Air Filtration Stands Apart
With years of experience designing improved cylinder heads, combustion chambers, and intake manifolds, Feuling brings that same engineering depth to their bolt-on air cleaner designs for Harley-Davidson motorcycles. The result is hardware that isn't styled to look like a performance upgrade — it's engineered to function as one. All Feuling products are made in the USA , underscoring the brand's commitment to quality and domestic craftsmanship. For any Harley rider serious about optimizing induction, Feuling's air filter lineup deserves a close look.