Another vote for VHT, I have used their coatings for many years and have been ecstatic with the durability. The only Ceramic coating that I have found comes close or worthwhile it JETHOT. We just had a set of headers done by a reputable local coater and they have discolored a bit near the exhaust ports on 3 cylinders with no apparent reason. ARRRGGGHHHH should have sent them to Jet hot or used VHT. twocents spank