I have an intercooler with two inlets and 1 3" outlet. I'm trying to figure out if I want to have the outlet going over the radiator or under the radiator. And I have a bunch of 4" aluminum tubing, small amount of 3.5" tubing, and no 3" tubing. So I was going to convert the ic outlet to the size I decide to run. I was thinking of oblonging/ovaling out the 4" pipe and originally planned to go over the rad and notch the good. But I suppose I could go under the rad now that I'm going to run a E fa