I think it's primarily for looks, though perhaps the titanium coating is supposed to help with more than that. You could ask full race to see what they say. The pipe is already stainless, that was good enough for me. Ceramic coatings are functional though for keeping heat in and corrosion away, but I've had mixed luck in the past on headers with that where they got too hot and looked dull... Still worked though, but they were really visible on that car and I was bummed. Probably user error with too lean a mixture...