Originally Posted by
martin24uk
Yeah have seen that bit not a problem, and its a stage 3 running
a 4x4 plenum at the moment ...

Utterly no pont then, you'll have the expense of a remap for the new plenum and the only noticeable difference afterwards will be it doesnt drive as nicely, and that its the same amount of power with slightly less boost.
You might gain like 5bhp or so if you are lucky, but that will be the limit of it realistically.