Ness-Tech Big Sucker Stage II Air Filter Kit for all 2006 Twin Cam models. Ness-Tech Product 18-506.
Source: Custom Chrome
Higher performance set-up flows 20% more air than the Stage 1 Big Sucker through the larger filter. All-in-one aluminum backing plate features built-in carb support. Breather tunnels at each head to decrease crankcase pressure. Includes the backing plate, high-flow air filter, four chrome banjo bolts, and all necessary hardware.