According to the website it does the following:
I originally bought the kit to see if it will eliminate a slight whine I get when driving at 80mph in sixth gear.
When I either lift off the throttle or accellerate past 80mph, it goes away, so I thought it might help.
So far I haven't noticed any of the advertised benefits as I have yet to take it onto the dual carriageway, did notice a slight smoothing in idle tho.
I already dismissed any claimed increases, due to our ECUs.
Would be interested to know how you get on with this (as in if you see any of the benefits!). And god you're spanking a lot of money on your car at the mo!