I noticed ALOT of places are offereing ceramic coating the exhuast mani inside and out. Is getting it coated insde a good idea I mean eventually it will flake at least a little, so wouldn't that cause damage to the turbine wheel?

I understand getting the o2 housing coated in and out, but not too sure about the manifold.

Any comments?

 

personally I wouldnt
Chances of this happening is slim though.