Abstract: Disclosed herein is a radiator comprising a heat exchanger that includes a plurality of fluid conduits for carrying a thermal fluid. Each fluid conduit extends along a longitudinal axis between a first end and a second end. At least some of the fluid conduits are laterally offset from each other. The radiator also comprises a direct-flow manifold and, a reverse-flow manifold. The direct flow manifold is for conveying the thermal fluid along a first flow direction between the first ends of the fluid conduits and a first radiator line. The reverse-flow manifold is for conveying the thermal fluid along a second flow direction between the second ends of the fluid conduits and an elbow passageway, and along a third flow direction between the elbow passageway and a second radiator line. The third flow direction is opposite to the second flow direction.