I had the complete system on a stock 91 vw vanagon done ( Vanagon exhaust used to be very expensive)...lasted about 2.5 years...Vanagon exhaust gets HOT...2.1l pushing a brick. Burned the nice pretty JetHot off at the 90 degree turns. They replaced it under warranty with the new "extreme coating"...It has been on the van for about two years...I can send you a sample...from my driveway...
lsg