I have always wanted to see the flow rating and pressure drop for the Hahn IC, I even asked Bill for it, never got the info. It seems to work well from what everyone has posted but these numbers are important. Lyndon Wester flowed and tested the Dejon IC and it has good numbers, you can have to big an IC, it will cool the charge very well but it can reduce boost by being to big or having to great a pressure drop. Lyndon offered to test the Hahn, if Bill paid shipping, no response from Bill.