I got a new exhaust fitted the other day as mine had had it, and it sounds so much louder than before and seems to be "chugging", particularly when it's stationary. I went back to the exhaust guys the next day and asked about it and he got it up on the ramp, checked for leaks etc but nothing. He said the noise is due to reverberation and once the car's been run for a couple of weeks the carbon build up will get rid of it, and if it doesn't to come back in a couple of weeks and he'll fit a new one. It's not so much the loudness of the exhaust that bothers me (it's only really loud in low revs), but the chugging noise is bothering me more. The guy said it should pass and there's not a blockage as there's no drop in performance or anything.


Basically, I don't know enough to challenge what he's saying or know if he's speaking sense - anyone here got any experience with brand new chugging exhausts? I'm more bothered about finding out sooner rather than later as I've got my MOT coming up in a week and a half, and don't want it to effect that.