While looking under exhaust on Ebay, I came across some graphite-type exhaust pipe wrap that you install using stainless clips to hold it on then, once on, it gets sprayed with a bonding/sealing agent that is supposed to protect it from abrasion and chemical spills. Anyone used such a thing? They claim that it allows increased exhaust temp at the head which facilitates exhaust flow and increases horsepower.
What's the scoop, anyone know?