Ummmm no. I own an 04 Cobra and am more familiar with mods, computer flashes, chips, etc than most. But this car is a completely different animal than other Fords. If you're brothers say it's possible to use a completely different ECM (that IS what you were advocating isn't it...not a flash) then they are writing code for Ford because nobody else knows a thing about that being possible. You need to clarify what they are saying. With what is available at this time, a different ECM is not available nor can it be switched to an aftermarket system such as FAST and have everything work like it does. Can it be done? Maybe...but I can promise you that you can't do it if you had to ask someone if it could be done. Not flaming you...just calling it like I see it. As to Quik...he is doing something that is well within the very limited parameters he has to work with on the stock ECM. Even he isn't positive it will be successful...but it should be because he already has the capability to tune the existing ECM...and that's the secret with this car.
If there were a market for items you discuss, you would see them available I'm sure. But the sad fact is no one is going to invest the R & D to develop them for such an incredibly small market. If they were to do so, the cost would be so prohibitive no one could afford them. Actually, I was quite surprised Magnaflow bent up an exhaust system!