I have the single exit kit, Overall the exhaust seems like a good quality system. The only thing I dont like about it, is the sound that it makes through the exhaust tip. Sounds almost like a diesel motor running. I made sure everything is installed correctly but it sounds wierd. The noise is even worse when the truck goes to 4 Cyl mode. I am happy with the exhaust, no drone at all, matter of fact it is just a little louder than stock, but once you get on the gas it sounds great. If I didnt have that noise, i would rate it higher. I have checked the truck and the exhaust and nothing is out of place.