the best that i can tell, removing the resonator is one of the main causes of the dreaded "rasp" sound that most of us try to avoid. All of the folks that i have talked to who removed the resonator said they immediately noticed a raspy sound in the exhaust, but when they welded the resonator back up to the exhaust(while keeping the same setup as before the res delete) the rasp went away and there was more of a throaty growl to the exhaust. just my .02 sense...