Momentum’s unique filter-to-housing interface was built to feature the largest air filter possible. This 8” tall, pre-oiled 360-degree radial flow air filter features a 4” round flange and features our pre-oiled Pro GUARD7 media. The Pro GUARD7 performance air filter features 5-layers of progressive cotton media with 2-layers of progressive synthetic media providing 99.7% cumulative efficiency for maximum filtration. (US PAT 06811588). 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 pending 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 soft EPDM hood seal is included to keep out hot engine air and create a perfect seal to the hood. This system features a high quality, computer-designed, dyno-tuned intake tube to achieve maximum power gains while maintaining a perfect fit. Its XLPE material is heat soak resistant and extremely durable. Momentum HD intakes are designed with fewer parts for a fast and easy installation. This is a direct fit intake system that utilizes factory mounting points and requires no cutting or modifications. All necessary clamps, couplings, and hardware are included.