Arlen Ness Big Sucker Factory Oval Upgrade Air Filter For Harley M8

Arlen Ness Big Sucker Factory Oval Upgrade Air Filter for Harley-Davidson M8

Unleash the full potential of your Milwaukee-Eight engine without changing the iconic silhouette of your motorcycle with the Arlen Ness Big Sucker Factory Oval Upgrade. This ingenious performance kit is specifically designed for Harley-Davidson M8 Touring and Softail models equipped with the factory oval air cleaner cover. By replacing only the internal filter and backing plate components, Arlen Ness provides a “stealth” performance boost that allows your engine to breathe far more efficiently than the stock paper element ever could.

Maximum Airflow with Big Sucker Technology

At the heart of this upgrade is the world-renowned Big Sucker filtration technology. Arlen Ness utilizes a high-performance, pre-oiled red cotton gauze filter that features a larger surface area and deeper pleats than the OEM unit. This design allows for a massive increase in air volume, which is essential for the high-displacement 107ci, 114ci, and 117ci engines. The filter is paired with a radius air inlet that smooths out turbulence as air enters the throttle body, resulting in crisper throttle response and a noticeable gain in torque throughout the powerband.

Retain Your Factory Aesthetic

Many riders love the look of their original Harley-Davidson oval air cleaner cover but want the performance of an aftermarket intake. The Factory Oval Upgrade is the perfect compromise. Because it is engineered to fit perfectly behind your stock OE cover, you can enjoy the “sleeper” look while benefiting from race-proven airflow. This kit is a complete replacement for the internal filter assembly, providing a clean, professional installation that looks factory-original from the outside but performs like a high-flow beast on the inside.

Washable and Reusable Media

One of the greatest benefits of the Arlen Ness Big Sucker is its longevity. Unlike the factory paper filters that must be thrown away when dirty, the Big Sucker filter media is washable and reusable. Simply clean and re-oil the filter element periodically to maintain peak performance for the life of your motorcycle. This not only saves you money on replacement parts over time but also ensures that your engine is always breathing the cleanest, most oxygen-rich air possible.

Fitment and Milwaukee-Eight Compatibility

This upgrade kit is designed for a precision fit on 2017-present Harley-Davidson models equipped with the factory oval air cleaner, including:

• Touring Series (2017–2025): Street Glide, Road Glide, Road King, and Electra Glide models with M8 engines.
• Softail Series (2018–2025): Heritage Classic, Deluxe, Fat Boy, and Slim models with M8 engines.
• Note: Specifically designed to reuse the factory oval-shaped outer cover.
• Note: Not compatible with models equipped with Round or Ventilator style intakes unless converted.

Arlen Ness Engineering Excellence

For over 50 years, Arlen Ness has been at the forefront of the custom motorcycle industry. This M8 Air Filter Upgrade features a rugged, high-quality backing plate and precision-machined components that eliminate the need for external hoses or hardware. The integrated hidden breather system is O-ringed at the heads and exits into the mouth of the throttle body, providing a clean and efficient look that minimizes oily buildup. When you choose Arlen Ness, you are choosing a legacy of performance and style.

Installation Insights

The Big Sucker Factory Oval Upgrade is a straightforward bolt-on project that can be completed in approximately 30 minutes with basic hand tools. The kit includes all necessary gaskets, O-rings, and mounting hardware. Because this kit significantly increases airflow, it is highly recommended to use a fuel tuner (such as a Vance & Hines FP4 or Dynojet Power Vision) to optimize your air-fuel ratio and unlock the maximum power gains from your Milwaukee-Eight engine.

Give your M8 the air it craves without sacrificing its style. Add the Arlen Ness Big Sucker Factory Oval Upgrade to your cart today!