Close-up of a Harley-Davidson motorcycle engine, showcasing Milwaukee-Eight metal components, signature Harley-Davidson branding, the Arlen Ness Big Sucker Stage 1 Air Cleaner for 2023-Up Big Twin models, and part of the bike’s seat and frame.

A red Harley-Davidson touring motorcycle equipped with an Arlen Ness Big Sucker Stage 1 Air Cleaner is parked on a street beside a concrete wall topped with a metal fence.

Arlen Ness Big Sucker Stage 1 Air Cleaner for 2023-Up Harley-Davidson Big Twin

$319.95

SKU: 109-0512

Low stock - 1 item left
Inventory on the way

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Product Videos

Arlen Ness Big Sucker Stage 1 Air Cleaner for Gen 2 Milwaukee-Eight

If you've looked at any group of Harley-Davidson motorcycles, it's highly likely you've seen a Big Sucker on the side of a few of them. There's a multitude of reasons for that.

Increases horsepower and torque, and really helps unlock the full potential of other power-adders you may have planned for your machine
- Smooth radius at the mouth of the backing plate allows unobstructed, rapid airflow
Can help eliminate breathing issues like unsightly leaks and drips
Black pre-oiled, high-performance air filter included
- Provides superior performance with an altered balance between airflow and filtration
Aluminum backing plate is beautifully machined, easy to install, and won't flex or warp like plastic can
- Features zero flat surfaces; every surface of the intake is radiused so as to promote airflow
CA-friendly—exempted when fitted to 2023 to 2026 models under California Air Resource Board exemption D-639-14
Kit contents
- Backing plate and filter ring
- Breather tube
- Performance filter element
- Filter cover (not included on No Cover kits)
- Gaskets
- Necessary fasteners
Finish options list backing plate finish followed by the filter cover finish option
- Please see fitment notes for clarity on air cleaner fitment as well as information regarding cover interchange details

Arlen Ness Big Sucker Stage 1 performance intakes for Milwaukee-Eight engines are a standby for experienced motorcycle mechanics, tuners, and riders because they work. The patent-pending hidden breather system passes through the backing plate and exits inside the mouth of the throttle body to help eliminate the drips that come with OE breather systems and air cleaners.

The air cleaner can flow quite a bit of air, so if you're adding parts like cams with bigger lift or duration numbers, ported cylinder heads, or an exhaust with particularly good scavenging capabilities, the Big Sucker is a great choice. It won't suppress the gains made from other performance items like OEM pieces have been known to do in similar situations.

These kits have a variety of cover options depending on model and factory equipment; please see the notes to familiarize yourself with the available options for your motorcycle.

2023-Up Harley-Davidson Touring CVO with Gen 2 M8
2024-Up Harley-Davidson Touring with Gen 2 M8
2025-Up Harley-Davidson Softail with Gen 2 M8
"No Cover" air cleaner options can be run as is or with Arlen Ness Big Sucker Stage 1 covers (available separately); not compatible with OE covers