last night I had developed a hole in my y-pipe. I brought it to the shop and they installed a new y-pipe. so i just picked it up and notice the car at a stop light shakes or vibrates alittle more then it use to. My gmmg exhaust sounds alittle toned down but there is some good out of this. My exhaust does not pop like it did. and it feels like I have alittle more power.

 

maybe something is loose? a collector or y-pipe connection? take it back and see what the can find.