Aftermarket Replacement Air Cleaner Assemblies are a convenient low cost way to maintain your engine and provide efficient clean air flow. Air Cleaner Assemblies come complete, assembled as show and include: air filter complete with pre-oil foam prefilter, air cleaner cover, breather tube, air cleaner elbow, stem grommets and wingnut. This rugged premium quality air cleaner assembly is specifically designed to fit GX 340 and 390 models.