aFe Takeda Momentum Cold Air Intake SystemPro 5R Large Five Layer Performance Air Filter: This 6 tall 360 degree radial flow air filter features a 3. 5" flange and our pre oiled Pro 5R media with five layers of progressively finer cotton gauze media for maximum performance. It provides your engine with the largest amount of high flowing air, usually resulting in the highest power gains out of all our filter media options. Its inverted bullet style top makes for more filter surface area,