Arlen Ness Big Sucker Stage 1 Air Cleaner for 1999–2017 Dyna

• Arlen Ness Big Sucker Stage 1 backing plate
• Red pre-oiled high-performance air filter
• Smooth Stage 1 air cleaner cover
• Installation hardware kit
• Installation instructions

Stage 1 High-Flow Intake Upgrade
Designed to increase airflow to the engine for improved horsepower, torque, throttle response, and overall performance.

Smooth Stage 1 Air Cleaner Cover
Includes a clean smooth-style air cleaner cover for a classic, polished look that fits the Dyna platform perfectly. Available in chrome or wrinkle black.

Patented Hidden Breather Technology
Each hidden breather is O-ringed at the heads and exits inside the mouth of the throttle body or carburetor, helping provide efficient engine breathing without external hoses or hardware.

Virtually Closed-Loop Breather System
The internal breather design keeps the setup clean by eliminating the need for external breather lines or extra visible hardware.

Pre-Oiled High-Performance Filter
Includes a red pre-oiled high-performance air filter designed to support increased airflow and performance.

One-Piece Aluminum Backing Plate
The one-piece aluminum backing plate provides strength, precision fitment, and integrated hidden breather function.

Radius Air Inlet for Maximum Airflow
The radius air inlet provides unobstructed airflow into the throttle body or carburetor for improved intake efficiency.

Increases Horsepower and Torque
Engineered and proven to help increase power and torque by allowing the engine to breathe more freely.

Complete Installation Kit
Includes the backing plate, air filter, air cleaner cover, hardware kit, and instructions for installation.

Fits:

• 1999–2017 Harley-Davidson Twin Cam Dyna models

Always confirm your exact year, model, engine setup, throttle body or carburetor configuration, and tuning requirements before ordering.

What does the Arlen Ness Big Sucker Stage 1 Air Cleaner do?
It increases airflow into the engine to support improved horsepower, torque, throttle response, and overall performance.

What models does this air cleaner fit?
This kit fits 1999–2017 Harley-Davidson Twin Cam Dyna models.

Does this kit include the air cleaner cover?
Yes. This kit includes the smooth Stage 1 air cleaner cover in your finish of choice.

Does this kit include an air filter?
Yes. It includes a red pre-oiled high-performance air filter.

What is hidden breather technology?
Arlen Ness hidden breather technology routes crankcase breathing internally through the backing plate and into the mouth of the throttle body or carburetor, eliminating the need for external hoses or breather hardware.

Does this air cleaner use external breather hoses?
No. The patented hidden breather system eliminates the need for external hoses or additional breather hardware.

What is the backing plate made from?
The backing plate is made from one-piece aluminum and includes integrated hidden breather technology.

Will this increase horsepower and torque?
Yes. The Big Sucker Stage 1 is engineered to increase airflow, which can help improve horsepower and torque.

Is tuning required?
Yes, tuning is recommended based on your intake, exhaust, engine setup, and other modifications.

Is professional installation recommended?
Professional installation is recommended to ensure proper fitment, breather alignment, hardware torque, and tuning.