Billet aluminum air filter for Walbro WT-603, WT-668 and other Walbro carbs. Features Uni Filter dual foam elements. Fits the HPI Baja 5b and many FG r/c cars. Also fits Go-Peds with RC engines. Fits carbs with a 3/4 inch entry hole and 30.5mm center-to-center bolt pattern. Weighs in at only 3.2 ounces! Includes mounting hardware and gasket.