I used Jet Hot on the exhaust that is on the VW engine that I happen to have up for sale. I can tell you that the exhaust external temperature is far less than without the coating and the exhausts are still in good condition after many years.
Regarding the guarantee. when I got the pipes for the Corvair coated, they gave me a xxx year guarantee. I asked what happened to the lifetime guarantee. They no longer do that. However they are definitely easy to work with when you need to get your pipes coated. It is also expensive, over $200 for my Corvair pipes. Regarding the heat issue. I have come to realize that this is a good thing and a maybe not so good thing. Good that the heat stays in the exhaust, but when you want to pull carb heat or cabin heat, it can be an issue. My Corvair pipes look great, but if I ever have to get new ones, they will be stainless because of the need to be able to pull heat off the pipes. The top two pics at: http://krbuilder.org/CorvairEngine/index.html show these pipes after and before, in Roy's shop. See N64KR at <http://krbuilder.org/> http://KRBuilder.org - Then click on the pics See you at the 2011 - KR Gathering in Mt. Vernon, Il - MVN There is a time for building and it never seems to end. Daniel R. Heath - Lexington, SC
