me, yes I plan on doing alot of things, but I know that in the end I'll probably have some limitations holding me back. Yes I plan on running dual glasspacks(somehow), my reason? Purely to get as much power as I can outta the engine. But than again I also plan on running the smaller 2.3 pulley, and making a custom cold air intake. You guys can discuss the better flow rates that mufflers give off, but if you guys killed the y-pipe, and had a dual in exhaust and single out, you'd probably get the best performance increase off of that. In regards to exhaust sound, I haven't spent any time in that category.