So I recently got an exhaust system, (dynomaxx)whatever that is. But after having it for about 2 weeks ive noticed some type of grey smoke coming out of the tips when I rev it. I also noticed that it sounds way different than when I first got the exhast. Is there something wrong with my car?

is it cold?

moisture?

The car isn't heating up if that's what you mean, and if your talking about weather.. than yeahh it was cold and now kinda humid. I touched the tailpipes and black dust got on my finger? The gas mileage went down too

black dust is pretty normal. that's pretty much built up exhaust gas. the inside of my tips are black.

do you notice a smell to the smoke? sweet or anything

yeah, It kinda smells like gas im not sure sweet tough. even when im driving it I sometimes notice the smell.

if the gas is strong, there might be a leak in your exhaust.

I should take it to the muffler shop again then?

if possible, check that everything is tight yourself.

either way, if something wasn't tight. it wouldn't cause grey smoke to come out of the exhaust.

unless that smoke was condensation in the first place, and nothing to worry about.

by the way, does this exhaust come with test pipes. if you're not sure, post a picture of the setup.

How do I check a leaky exhaust, and Thanks You for helping me out man means a lot. ima post a pic

All the flanges (sections where two pipes meet), check if any bolts are loose or missing.

If the setup came with test pipes or high flow cats, that could explain the smell. Which would be normal for test pipes/HFC. (test pipes having a lot stronger smell)

But it wouldn't explain the grey smoke. Which at this point, I'm assuming to be just condensation.

You could check your oil cap and see if it's a milky substance or check your coolant level to see if you're burning any.

Its a true dual, and I didn't see any bolts loose.

looks fine to me. looks like you have the oem catalytic converter. so i don't see where the smell could be coming from.

the smoke is probably just condensation, unless you can take a video