Description Pro 5R Five Layer Performance Air Filters: These 6” tall 360-degree radial flow air filters feature a 3-1/2” round flange and our pre-oiled Pro 5R media, with five layers of progressively finer cotton gauze media for maximum performance. They provide your engine with the largest amount of high-flowing air, usually resulting in the highest power gains out of all our filter media options. This media is perfect for street and/or track use. Their inverted bullet-style tops make for more filter surface area, resulting in longer service intervals. Pro Dry S Large Three Layer Performance Air Filter: These 6” tall 360-degree radial flow air filters feature a 3-1/2” round flange and our oil-free Pro DRY S media, with three layers of synthetic media for maximum convenience. The progressive layering provides great filtration efficiency and dust holding capacity, while not requiring the use of oils. This media is best suited for street and light off-road use. Their inverted bullet-style tops make for more filter surface area, resulting in longer service intervals. Unique One-Piece Housings: The smooth one-piece sealed housings, constructed of heat-resistant XLPE (cross-linked polyethylene) polymer, feature our patent-pending filter-to-housing interface. Two clear sight windows allow for hassle-free filter inspection, without having to disassemble your system. Dyno-Tuned Intake Tubes: This system features high quality, computer-designed, dyno-tuned intake tubes to achieve maximum power gains while maintaining a perfect fit. Their XLPE material is heat soak resistant and extremely durable. Hassle-Free Installation: Stainless-steel clamps and ribbed silicone couplings are included for strength and durability. Takeda Momentum intakes are designed with fewer parts for a fast and easy installation. The included barbed fitting and silicone hoses allow the stock connection to transfer over seamlessly.