He has a couple of ideas one of which is one size piping. He intends on making it for sale for all as well not just for cars he works on... I've seen some of his fab work it and it is spot on. I think when this comes to market it will increase drivability, fuel mileage, and maybe make a little more power. I think it is an awesome idea and if it works the way it could he should sell a couple 100 of these.