aFe MagnumFLOW Pro 5R Air Filters 3in F x 5-1/2in B x 5-1/4in T (Inverted) x 8in HaFe MagnumFLOW Pro 5R Air Filters 3in F x 5 1 2in B x 5 1 4in T (Inverted) x 8in H This filter features five layers of pre oiled cotton gauze media to provide maximum performance. Its progressive layering allows the filter to flow at high levels even when dirty, while its inverted top makes for more filter surface area, resulting in longer service intervals. The air filter is wrapped in reinforced metal providing maximum strength to prevent filter