K&N Universal Filter 3 inch Flange 6 inch Base 5 1/4 inch Top 5 inch Height w/ Polished TopK&N Inverted Top Universal Air Filters This unique approach to filter design and concept utilizes a filtering top that actually inverts, dropping into the cylinder of the filter. Surface area is greatly increased and designed to provide more filtration than any other comparably sized product. With three color options you can customize your intake to match the rest of your car.