Momentums unique filter-to-housing interface was built to feature the largest air filter possible. This 9 tall, pre-oiled 360-degree radial flow air filter features a 5-1/2 flange and our pre-oiled Pro 10R media with ten layers of progressively finer cotton gauze media for maximum performance and filtration. Its inverted top and large surface area provide much longer life between maintenance intervals, while reinforced metal provides maximum strength to prevent filter collapse. This media is best suited for off-road applications. The smooth one-piece sealed housing, constructed of heat-resistant cross-linked polyethylene (XLPE), features our patented (US PAT 9440175) filter-to-housing interface. Its innovative design minimizes the total number of parts, making for an easy installation. A large, clear sight window allows for hassle-free filter inspection, without having to disassemble your system. The housing incorporates factory air scoop inlets, using no additional hardware, and features an optional auxiliary air inlet that pulls in additional air. This system features a pair of high quality, computer-designed, dyno-tuned intake tubes to achieve maximum power gains while maintaining a perfect fit. The XLPE material is heat soak resistant and extremely durable. Stainless-steel clamps and silicone couplings are used for strength and durability. Momentum HD intakes are designed with fewer parts for a fast and easy installation.