[james4321]

Yesterday I have changed the exhaust tips (M Perf Carbon) and before I was not interested so much with my exhaust. 😉
Today I came back, after small city driving, to the garage and reved a bit my car on idle. Went to see my tips and I saw a bit of smoke. Did not check it this way before, so I don’t know for how long it’s smoking. Not much, but visible smoke. When car is idling I can see almost nothing. Need to use flashlight to see just a bit of smoke on idle speed and only from driver side.
I can’t see any smoke when driving. Tips are perfectly clean (old and new), no soot at all.
My car is N55 EWG FBO Catless DP.
Should I worry about that?

[thejeremyman9]

Driver side is because of the exhaust flap if you have a valved exhaust.

Catless is definitely a factor, if you need to see a flashlight to see it, its probably fine

[james4321]

Originally Posted by thejeremyman9

Driver side is because of the exhaust flap if you have a valved exhaust.

Catless is definitely a factor, if you need to see a flashlight to see it, its probably fine

To see on idle speed. When you rev over 1000rpm you can see it without flashlight. But it’s not much of smoke. Yes, because of the valve, but this is the valve side.

[thejeremyman9]

Read this https://f30.bimmerpost.com/forums/sh....php?t=2048960

[james4321]

Originally Posted by thejeremyman9

Read this https://f30.bimmerpost.com/forums/sh....php?t=2048960

This: ‚ They told me that it is normal haha, the guy at the desk ran a catless M2 himself that did the same thing.’

I think I will do the same. Just wait until it’s worse. Now I need to rev at idle over 1000rpm. otherwise car is not smoking at all.