Arlen Ness 18-323 Big Sucker Stage I Air Filter Kit with Cover Features a one-piece aluminum backing plate/carb support bracket with patented hidden Breather technology and radius air inlet Eliminates 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 Kit Includes high-performance filter, backing plate and Steel outer cover All necessary hardware and instructions are included with each kit