On a hot day their hot I can feel the heat at 100kph but then again the original headers were hot too. The polished ceramic has dulled on the first bend off all 3 pipes after a very spirited ride (flogged the fu#k out of it) the other night. Looked down and the headers were glowing red too the collector. Might polish up but will go dull again next time so I think I'll learn to live with it. As for the heat I can can live with it. Some things are worth a little discomfort.