[Wildman]

Ok, back on topic... Resonators should help with getting rid of the "yogurt" sound. If theres not much back pressure, It will make those noises when you back off the gas and let the engine slow you down. I don't know why people insist on going with "bypass" or "offroad" or whatever pipes. Your not gaining much if anything by doing it, and your going to make it sound like absolute hell and cause inspection issues down the road. Not trying to offend anyone on here, just my $.02 . Just do it right the first time and you'll be so much happier in the long run. My S&S headers, "stock" cat and Borla cat back have been more than flawless and sound perfect for a V6 without any embarrassing popping or any other noises. IMO, it's one of the perfect setup for the Alero and I have gotten quite a few compliments about my exhaust tone while on the dyno. Hope this helps.