The original Cobalt radiator and electric fan are used. The GTX frame has mounting tabs welded to the frame to make the radiator installation fairly simple. 4, O.E.M. mounting grommets are used to secure the radiator to the frame mounts. The original surge tank is used. Currently, the builder will have to fabricate their own water lines from the engine to the radiator. We are developing a cooling system kit which will be available shortly.