Originally Posted by Power Surge
Keeping the heat in the pipe does promote better exhaust velocity, however that usually only applies to high velocity exhaust components like headers and turbo down pipes. I do not see any advantage of wrapping the actual exhaust piping on these cars.
This is probably true, and I would imagine more true with a 2.5" exhaust...
My thought process is that if you can use the temp to speed up the larger open area that the high velocity components (actually the whole system) would flow smoother.
Probably just over-analyzed on my part.