Arlen Ness Big Sucker Stage I Air Cleaner Kit – Natural Finish

Premium Performance Air Cleaner with Hidden Breather Technology

Experience the perfect blend of performance and precision engineering with the Arlen Ness Big Sucker Stage I Air Cleaner Kit. Designed for Twin Cam Delphi EFI and CV Carb models (2001–2017), this system delivers superior airflow and power gains while maintaining a clean, factory-style appearance.

Featuring a one-piece aluminum backing plate with integrated hidden breather technology, this air cleaner eliminates the need for external hoses and provides a virtually closed-loop system for efficient engine breathing.

Each pre-oiled, washable filter is made from four layers of surgical-grade cotton, providing maximum airflow and filtration for increased horsepower and torque.

Key Features

• Hidden Breather System
  Each breather is O-ringed at the heads and exits directly into the mouth of the injector or carburetor — eliminating external hoses for a cleaner look and better performance.

• One-Piece Aluminum Backing Plate
  Built for durability and precision, providing strength and a perfect fit every time.

• Radius Air Inlet
  Optimizes airflow for increased horsepower and torque by minimizing restriction.

• Reusable, Washable Filter Element
  Pre-oiled and made from four layers of surgical-grade cotton for maximum filtration and performance.

• Compatible with Arlen Ness® Stage I Round Covers Only
  Designed for riders who want a clean, custom appearance that retains OEM compatibility.

• All Hardware Included
  Comes complete with mounting hardware and detailed installation instructions for a simple, bolt-on setup.

• Made in the USA
  Handcrafted with precision using the highest-quality materials for lasting performance.

Specifications

Fitment

Fits Harley-Davidson® Models (1999–2017):

• Touring: Road Glide, Street Glide, Electra Glide, Road King (1999–2007)

• Softail: Fat Boy, Heritage Softail, Deluxe, Slim, Springer, Standard, Custom (2000–2017)

• Dyna: Street Bob, Low Rider, Super Glide, Fat Bob, Wide Glide (1999–2017)

• CVO Models: Select 2001–2017 Twin Cam EFI and CV Carbureted CVO models

Note: Accepts Arlen Ness® Stage I round covers only. Not for use with aftermarket Stage II covers.
Emissions-related part. Not legal for sale or use in California on any pollution-controlled motor vehicle.

Performance Benefits

• Increases horsepower and torque with enhanced airflow.

• Improves engine breathing efficiency through hidden breather design.

• Provides clean, unobstructed airflow with a radius inlet.

• Washable and reusable for long-term value and easy maintenance.