I always wanted one, had it on the car for 3 months and took it off, car does not run as smooth and having problems... when I change gear some times doesnt vent and the revs seem to rise by say 200 rpm, though it was me being lazy on the juice pedal but no.
Only happens every say 20 changes normally going 3rd to 4th when not giving it stick, this stops as soon as I put the standard recirc back on

Forge seem to be a really helpfull and replaced the first one ( faulty just hissed all the time) and could not be more helpfull but sorry guys not for me. Love the sound on full boost but when lazying around u get a wimpy woft of air released, May be its trying to speak Micra, I don't know

 

It won't give a loud 'whoosh' if you are on light throttle because the turbo is not boosting fully.
I have a Bailey motorsport VTA on mine and it gives a slight hiss on light acceleration.This is normal....Full throttle wakes the dead!!

steve.

 

I had a forge, (my plumbing doesn't allow for a recirc anymore). They were helpful but I found a few problems that couldn't be fixed even with aftermarket engine management. I replaced it with an HKS which works fine, but is a tad too noisy for my liking YMMV.

Vince