K&N Custom Air Filters for Weber Carburetors - K&N Custom Air Filter kits are designed to boost performance from your carburetor while keeping the dirt on the outside where it belongs. Show quality to fit racing vehicles with VW, Pinto or any other engine equipped with these performance carburetors. All assemblies come with a famous K&N High-Flow Washable Air Filter. All assemblies are convenient to clean and service.