We have a Jet Hot shiney silver exhaust on the jeep. It absolutely keeps the heat down...the headers are stainless that also has Jet Hot coating. The only problem with the Jet Hot is when oil or grease gets on a hot pipe. For instance, some grease from a u-joint slung on the pipe....the stain will not come off even when I shout "Out, damn spot!" Be careful of grease and oil and you should be OK.

mike in tucson