I have the same
auxiliary radiator setup that christopherglenn has. The radiator it's self is made by Ron Davis Racing, Joe has someone that makes the brackets and other parts. I bought just the radiator and the bracket. Then bought the hoses and other parts local, we don't have the fan on the auxiliary. It has been the best $$ I've spent on our truck. It or the V2 kit that was made before have a very high rate of success in keeping LLY's from over heating. I have also changed the turbo inlet to a LBZ one, but that made no noticeable difference in what temperatures the engine ran at. The auxiliary radiator did, and also by not wasting HP running the fan now we get better MPG.