[bl1nky89]

After a week with my Dynomax Catback I started to notice a vibration and a really annoying frequency coming from it , sounds like a tractor trailer is parked next to me. What might be the issue?

 

[bl1nky89]

This is mostly when I first start the car and is in idle, after I drive it away is less noticeable but still there.

 

[mdrums]

Lose clamp or hanger. Check all the fittings

 

[jeepin48]

What is the exact system? does it have a valve in the muffler? That can cause weird noises.