Ok its Friday and the sun must have gone to my head, but aI had a roll of exhaust wrap that claims to give you more bhp, how? Well didnt ask that question but have fitted it between the cat - back box and down pipe - cat. Not a pleasent job as jacked up one side of the car and kept it up on stands so just enough room to crawl under praying the stands would not slip as I'm not that thin and it was a bit of a squeeze!!! Feel any different? Err not sure.....

Oh yeah the stuff is.... http://www.thermotec.com/products/full/11001/11001.html

Thermal insulation keeps heat which is energy where its supposed to be.

Usually only used on manifolds in engine bays to reduce engine bay temps.