if you dont want real loud but a mussely rumble, check out the BUBB pipes. not greatly loud like depters, but not wimpy like the stock ones. at idle is is mellow power sound.

If you have everything stock, i would say the least of the changes would be removing the AI. get a uni filter replacement (low$$) and bigger main/slow jets. you will not regret it. I noticed a diff immieadatly.

Mal: "Y'all see the man hanging out of the spaceship with the really big gun?{ref, Jayne} Man's lookin' to kill some folk. So really, it's his will y'all should worry about thwarting."