Arlen Ness Stage 2 Big Sucker Air Cleaner Kit For Harley The Arlen Ness Stage II Big Sucker Kit has the features you need for the best motorcycle performance, including a one-piece aluminum backing plate with carb/throttle body support bracket that eliminates the need for banjo fittings. Specialized breather passages exit at the mouth of the carb or throttle body, creating a closed-loop system for better performance. Enjoy a 20 percent larger high-flow filter with the Stage II. Accepts an 8 round or 8 OEM outer cover. The Scalloped chrome steel cover keeps your motorcycle looking as good as it sounds. Features: All in one backing plate features a built in carb support and built in breather tunnels Tunnels exit at the mouth of the carb to create a virtually closed loop system Backing plate has O-ring breather bolts and a radiused intake manifold Kit includes an aluminum backing plate, Team Ness high flow air filter, billet aluminum air filter cover and all necessary hardware 'Big Sucker' stage II features 20 more air flow with an 7 x 2-3/4 round filter Carb E.o. # D-639-7