at over £900 plus the fact you'd need custom oil and water lines and gaskets, your probably looking at £1100 fitted
which could probably be spent better elsewhere (brakes etc)
I think that is the same manifold i've got that is listed there, it's nice manifold, but mine was ceramic coated aswell (another £200) so as you can see it starts to get expensive :shock:
And don't think you'd get a massive gain until you went upto a larger turbo.
end of the day it's up to you, the manifold's nice and i hope to keep mine but if you need custom rad/fans like mine did it'll just whack the whole lot to well over £1500 just for a manifold which is sh*t loads really