I have a set of rewarder zoomies that just got back from being ceramic coated. Looks beautifull. the pipes are 2.5 inches. They are water injected. I have 2 sets of baffles for them also. I would trade for a set of twisted headers for a bbc with pipe size of 2.5 inches. i would like to have a set of ceramic coated ones if i could. Or i would sell them for $600.