You know... I think I am going to do just what I had planned. 2" inlet. 2.5" outlet to the TB. I do however have one other question.. When they give you the sizes for FMIC, is that the size of the core.. or all togeather. Because I am trying to cover the entire front of the car so that it looks like a radiator(painting my fmic black with raidator paint(doesn't effect the fmic)).

Also thank you Spamnavy, I appreciate the detailed picture that helped me out.

Core. But really there should be a diagram showing all dimensions. Do you have a specific model you're contemplating?