Earl's curved coolers are constructed with the same high grade aluminum and the same internal design as our standard 2 inch coolers, but have a curved design to fit neatly between the down tubes of the frame of a motorcycle for maximum heat dissipation. The curved design allows for full wheel travel no matter where it is mounted on the front of the frame. These coolers are only 1–1/4 inch thick and are available in two widths, three different heights and male -6 or -8 inlet and outlet fittings.