I am trying to remember when I told you where those pipes started making power and what kind of numbers they made. Oh, thats right I didn't, I only told you where they stopped making power. I have a very torquey bike, that makes very broad power, and it starts making it hugely at around 2500-3000rpm. Its not hard to do either, most of the parts you buy to do it are cheaper than your tradional banshee hp parts. The port work is cheaper, the carb setup is cheaper, the reeds are cheaper, and most of all a 2 into 1 pipe is cheaper than twin pipes. Get real, the guy is not going to sell his bike to get a 4 stroke.