Testing intercoolers objectively requires a four-groups design: before and after with the old intercooler, and before and after with the new intercooler. Without looking at all four data values, you either miss out on establishing a baseline for comparison, or you miss any performance changes. Either way, you'll have no way of telling how the new intercooler affects the way your setup runs. For $180 shipped, the CXRacing Direct Fit is probably the best value for the dollar - performance gains may be minimal (although in most pump gas applications, heat soak will be reduced enough to justify the expense), but at least you won't be out $600, nor will you experience a 5psi pressure drop, as you would in the event you had invested in a BFMIC that doesn't measure up. For big turbo pump gas applications, the CXRacing DF will probably not be satisfactory. I'm buying this intercooler for my bolt-on stock turbo and putting it in next month.
'05 Silver - DD - 110xxx miles
E85 stock turbo - who needs traction in 3rd?
Mods list: [very long list of bolt-ons goes here]
Looks like stock, goes like stink
I GOT 99 PROBLEMS BUT LOW TEMPS AIN'T ONE
Hopefully getting 1/4 times before finishing grad school, but after getting slicks...