Aftermarket exhausts causing black soot
 

so I put a nameless axle back on my car with 4" tips. After ~week of driving the tips are covered in black soot.

My friend has a j2 catback on his and same thing.

Is this common? Reason for the soot? Anyway to keep it from creating the soot?

please tell me this isn't a serious question....

Why would it not be? I've never owned a vehicle that turned tips black after a week. Even more so with a cat in the mix. My eclipse is a straight piped exhaust from turbo back, guess what...no black soot. My 1500 is a dual straight pipe, no black soot.

If your not going to be constructive, you don't need to reply. Simple as that.

Please tell me you are going to contribute more to the forums than some BS worthless post.

Are you running a catless header or front pipe? Several things could be causing soot to develop but even aggressive driving on a stock vehicle could cause the same thing.

Everything on mine is factory other than the axle back. Which is why I just don't understand it. I guess it technically be from aggressive driving.

Ah, this is nothing out of the normal for almost any car. You just clean it when you clean the car.

something about a kettle calling the pot black.

its normal, stock or modified. How much carbon there is can be related to the mods.

considering carbon is a byproduct of fire and there are many explosions going on in the engine bay you should be able to see that its normal

My completely stock BRZ(including exhaust) accumulates black soot on the exhaust too. It's a combustion engine, what do you expect?

want it to go away? buy a Nissan Leaf lol

You know, I understand why people are getting bent out of shape with this question.

and I understand why people are getting upset for other members not replying with constructive posts.

BUT. This question is on the same level as: I left my car parked on the street and it rained. After the rained stopped I went for a drive and noticed HUNDREDS of spots on my car.

Welcome to every car on the road. It's a byproduct of combustion. You'll have to clean it off. Happens on catless cars, happens on bone stock catted cars with all sorts of restrictions. No getting around it.

Just make sure your muffler bearings are not exposed and you should be good.

Pretty sure you all took it way out of context. I'm not saying a motor should never create any. I'm saying I don't believe a stock motor with stock exhaust should create enough to turn 4" tips completely black in a weeks time. If I had no mufflers, no resonators, and no cats. I could understand a good bit being produced out the tip. But with 2 cats, resonators and 2 mufflers, that's ALOT of black making it through in my eyes.