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The Arlen Ness fuel and air products are created to improve the performance of your motorcycle efficiently. It features an all-in-one backing plate with built-in carb support and built-in breather tunnels at each head to decrease crankcase pressure. Each tunnel exits at the mount of the carburetor to create a virtually closed-loop system. The Breather features O-ring banjo bolt seals and a radiused intake manifold. It does not contain oil hoses and oil fittings, which prevent leaking hence allowing no mess. Please choose from our wide variety of Arlen Ness fuel & air products below, ranging from intake kits to fuel tuners, to air filters, and many more for all your motorcycle needs.