Installed a catless downpipe today and noticed when decelerating from 4k+ rpm it would vibrate super loud and be obnoxiously loud coming from my turbo side.

My coins in my cup holder sound like a tambourine.

Same thing also happens when I change gears almost wide open throttle.

 

um.. did you put gaskets in it?

 

A shop installed it for me but they used the 3 hole gasket that came with it and ordered something for the 4 hole.

 

Im not sure then lol. I bolted mine on with the supplied gasket and havent touched it since.

 

I used a triangle gasket and an o ring gasket for the side with the square...no problems

 

So basically what I am experiencing is not right?

 

doesnt sound it should have been like an o ring gasket by the turbo and a triangle gasket at the other end near the exhaust.

 

Make sure everything is tight?

 

Shouldnt be that loud and have vibrations...Something isnt lined up correctly. Only car ive ever road in that had symtoms like that was a open DP SRT4. lol

 

I had the same thing happen, had to re-center the turbo side gasket as there was a small leak causing a resonance.

 

Ehhhmm.... Check the heat shield.