so I've had my Megan single exhaust for about 3 years now and over the last year or so I've noticed that when it gets cold out that it starts to rattle at low RPMs, idle and when I take a turn. Anyone know what could be causing this? I haven't put 20-25k miles on the exhaust since I've gotten it and I checked all the bolts and I've checked to make sure it's not touching the bumper. Any suggestions? This isn't an issue as long as it's 75 degrees or warmer.

 

It's probably coming apart internally, it's a Megan part, so it's not really high quality

 

Put it up on a lift and check for cracks as Megan exhausts are known for very thin gauged metal.

 

those^

also check to see if its touching the diff / sway bar / crossmember

 

The exhaust is only about an inch or less away from the differential. It's either that or the rubber that holds the exhaust to the car is starting to break. It's not the exhaust itself because I checked and there's no scratches or scuffs on it. Might have to do some modifying to get it back to normal!

 

I think he was referring to the internals of the actual muffler. Something could be rattling in there?

 

I don't think so because the amount of time it actually does it is close to 1-2% (basically only when its cold, when I turn or when the rev is at the very end).