Just got the straight pipe installed at the shop yesterday and all of a sudden when I put it in reverse and accelarate, it rattles and shakes kinda loud. Can it be loose? So far this only happened in reverse and when the car was idle it started again slightly but the most noise was when I put it in reverse. I haven't got a chance to go under and look at it. Any idea guys?

Thanks...

 

Check the pipe or make sure he put the Bpipe hanger back on the bracket. I had to remove it off it to get some more clearance to get the cat off. Maybe the shop forgot about the hanger and thats where the vibration is coming from. I cant see them leaving the bolts loose, that would be horrible and you would hear exhaust noise from under your seat as well.

Dixit