Not to sound like a d!ck but I think your going about this wrong. I think alot of people would be interested but quite frankly you lost alot of credibility with the intercooler cores you were selling. Make a set of these headers, install them on a car, and I may be interested. And if you do get 5 people, don't ask for money before the product is made or your going to run into the same problem as before. In all honesty I think if you fab up 5 sets and show people 1 set installed you will have no issues selling them. Your going to have to make an investment before you see any return.