I had it on my Focus when it was supercharged. Wizards of NOS fitted it at Doncaster, only worked properly when I got it set up correctly by Chris Todd. The "Wizards" had fitted the fuel feed to the fuel solenoid onto the fuel return line instead of the fuel rail pressurised feed, ie. no enrichment fuel when the nitrous was on - I could have been looking at nicely melted pistons

When it's done right, it's excellent stuff, although I only used it at Santa Pod - honest