Heat wrap. Any good ?

[CB3]

I have heard heat wrap is good to use on manifolds & induction pipes which keeps the heat in for better acceleration & could get gains up to 4bhp.
Has any one tried anything like this or is it a complete waste of time ?

[AR]

Ceramic coating inside and out is the way to go. Heathwrap will weaken the welds.

[VtecLover]

Only really worth doing if your running an open filter, what set up have you got at the minute?

[CB3]

yeh open filter but decided not to heat wrap it now.
thanks vteclover'