If you want to open the exhaust up, get a better mid-pipe. If that's the factory H pipe, it's got 6 friggin cats on it.
If you have emissions testing, you may want to go catted midpipe unless you don't mind getting a catless (cheaper, better performance) and switching back to the stock H when it comes time for emissions testing. An offroad H with those Flow's would sound sick.
Oh, and gears!!!