Arlen Ness 18-511 Big Sucker Performance Air Filter Kit Feature a one-piece aluminum backing plate/carb support bracket Eliminate the need for banjo Fittings, Hoses and filter Breather passages exit at the mouth of the carburetor/throttle body, creating a virtually closed-loop system Stage I kit Includes a high-flow filter and accepts 93-15 oval or round OEM outer cover (unless noted) Stage II kit Includes a 20% larger high-flow filter and accepts an 8" round ness or 8" round OEM outer cover