I ended up putting everything before the Y back to stock. I was getting too much noise even after break-in and also I noticed that my mileage got pretty bad. I drive highway mostly with the cruise control so it had to be the exhaust causing some of that. Though it has been cold also...

The thing sounds a little more neutered than I might like, but it still has a little sound sometimes. I think it's what I'm going to have to stick with for a while because I don't want to put any more time and money into it. I figure for the miniscule amount of horsepower I might gain, it's too much trouble.