Arlen Ness Stage 1 Smooth Big Sucker Air Cleaner Kit For Harley
Arlen Ness, the “King of Choppers”, knows a thing or two about performance. The Big Sucker is the best-selling and most powerful air cleaner kit on the market – period. Simply, the Big Sucker is designed to give your engine maximum airflow for maximum performance. Testing shows that by simply installing a Big Sucker kit, horsepower gains of up to 21% are attainable.
Big Sucker kits feature patented, hidden breather backing plate technology – this means the breathers are incorporated into the air cleaner housing itself. Gone are unsightly external hoses and hardware, giving your bike a super-clean look. Each hidden breather has a sealing O-ring at the heads and exits at the carburetor or throttle body inlet to provide efficient internal engine pressure relief. 
The Standard air filter elements are made one at a time using the finest materials available. Standard filters are all pre-oiled, and feature four layers of surgical-grade cotton to promote airflow and filter air effectively.
The Synthetic Stainless Jacketed filter features a synthetic material that is water resistant and never needs to be oiled. Just wash and re-use. The mesh supporting the gauze is made of a rust-resistant stainless steel as opposed to standard carbon steel, and the synthetic filtration gauze is in black or dark grey, rather than the pink/red hue of the Standard Filter.
The filters are hand-poured one at a time in a urethane body, unlike many other filters that are spun, which can leave a residue on the filtration media.
All kits include a Big Sucker backing plate, high-flow filter, chrome banjo bolts, gasket, hardware, and simple instructions. Made in the USA.
Features:

Hidden breather technology built into backing plate

Steel or billet aluminum outer cover

High-flow standard or synthetic air filter

Chrome banjo bolts

Gaskets, hardware and simple instructions included

Made in the USA
Note: Air cleaner images are for reference only. All kits will include filter of your choice.