I have noticed some slight increase in engine vibration of aftermarket exhausts being transmitted into the chassis. Now, most cars have their exhaust systems isolated with rubber hangers etc, (I think).
How is our exhaust system isolated? Do those band clamps secure the muffler to part of the engine which is isolated on its mounts? or the chassis where it is not. If the latter maybe it would help to jam some high temp. silicone or whatever between the muffler and the band clamp brackets. Also if the muffler is secured to the chassis side how does engine movement not fatigue the exhaust?
Or maybe I'm getting completely carried away with this.
Bob

 

The aftermarket exhausts mount in the same fashion as the stocker. The only difference, the stock exhaust has the accordion type connection in the middle, this probably allows for movement and variation.

 

With a high end exhaust system (like the FVD) you do not have any more vibration than stock! There is no need for extra insolation.

 

yep, I'm wondering that same thought.
but as I'm stuck with what I have for the time being.
the question boils down to:
is the muffler strap support part of the engine assembly, or the chassis?
So, the FVD system does not import ANY engine vibration?

 

What system do you have right now?

 

No vibration with my FVD at all

 

non noticed on my cargraphic. make sure its all tight under there.

 

Double check the installation. Sometimes, if "straps" that come with the aftermarket exhaust are not the right size or don't hold the center muffler tight enough against the bracket, it can vibrate against the mounting bracket. That vibration can easily transmit into the cabin.

 

Thanks!
Pretty sure its tight.
I torqued the bolts 'a 1/4 turn before they break' (old wrench joke)
and there's still bolt gap, so the clamps were correctly sized and the muffler is as tight as tight gets. Its a minor periodic vibration but enough to make the dash buzz now and then. Its about like a phone on buzz as you go through that rpm.