Just starting noticinga more drone like exhaust note on my '05x. I have 125K on the clock. I don't see any holes or gaps anywhere.

Anyone have similar experiences?

Thanks,
George

 

More than likely you have a leak.

Rear muffler flange seems to be the biggest culprit, but check the two flex pipe connections as well. Have a buddy stuff an old t-shirt into the tailpipes which you check for leaks. Should help hear/see the puttering.

When my exhaust note started to drone more, this was the cause. I noticed it much earlier, but this is the point it got to before I fixed it

 

Same situation here, 2005 G35x, muffler rusted out at that rear flange and had to replace it

 

Mine too I have to fix it eventually!

 

Check your gaskets. Tighten down the bolts... bring it on a lift and have some1 rev it while you look at all aspects of exhausts... do you feel any power loss??

 

Check bolts.

 

Thank you all for your replies. I don't really notice a power loss, but then again I may have gotten used to the feeling by now.

I definitely have corrosion around the flange and I'm guessing that there is a leak there.

Got keep this baby alive, so I'll spend a few bucks to get this fixed.

George

 

If you let it get worse, you'll notice a loss in torque. If you look at mine, there was about a 3/8" gap around 1/2 of the diameter of the pipe. It's a pretty significant leak in my case.

Once i repaired it, I gained some low end torque back. Def made the car feel a little more responsive. It would definitely lead me to beleive that running mufflerless might make the car slower.

Most importantly...it's quiet!

 

Good news. Found a very reputable and very economical local exhaust shop that will do the repair. $75 in 30 minutes. Not too bad.

George

 

^ Did it work? Another place to look is the flex pipe - I've scraped apart several of those.

 

Got 'er done throught a local shop for $75 and 45 minutes of waiting. There was a pretty good separation almost half way arouund. He cut off the flange and welded in a new short piece of pipe.

She sounds better and seems to even perform better now.

Interesting as I sat and waited that an FX pulled up for the same repair. According to the exhaust guy, those seem to even be worse than the G's.

GK

 

Happen to me twice already i can only assume its a thin metal, and the Y-pipe too...

 

I bet the ground on the flange at that exact spot has something to do with it.


I def noticed an increase in torque once I hacked off the rotted flange and fixed the leak.

 

Mine is severely damaged as well. Awful drone and the heat shield was rattling too

 

The worst part is that it tripped the sensor so now my engine light is continuously on