I very much doubt if it's chome applied on to stainless steel.
Stainless manifolds stain, particularly in the area closest to the cylinder head where the exhaust gasses are hottest.
You could try polishing it out or simply admire life's chemistry and metallurgy at work! If it works, why worry?
Last edited by Cheshire_David; 14/03/16 09:48 AM.
