Sorry but I gotta get in on this one, Im in San Diego, I send all my stuff to Dynoedge, I'm really impressed w/ their work.
If you're gonna gain around 72hp, you got to expect to lose something on the bottom end.
i believe best bottom end is on a stock banshee.
I agree that 2 into 1 anything should not be on a banshee. Im surprised they havent invented 2 into1 cylinder yet. LOL