WOW! That'd be fantastic.
Ironically, I had a read of their UK site, and I read it as the "Evolve Switch" as being for Diesel cars only.
http://www.evo-s.co.uk/shop/index.php?cPath=3016
I hope your talking about something different. That may just do it for me.
Having read about the "Evolve Switch", in my email, I asked them specifically about whether they planned something like that for non-diesel cars.
I'll let you know what they come back with.