insulating exhaust

i heard that wrapping your exhaust in some insulation will keep your gases hotter, which would make them exit faster which will sliiiiiiiightly increase performance. is this true or bs?

even if it was it would probably respond the same way as wrapped headers by cracking and screwing over your piping, dont do it.

you only really benifit from exhaust wrap on your header cause it keep the engine bay cooler

it also increases scavenging so the exaust flows a little better