i was wondering if there would be any problems using the N/X universal Import Nitrous Express EFI Nitrous System on the focus? i see it says universal so it can be used with any car but it also says import and ours are domestic?

I have the universal NX EFI kit on my focus. I don't know if there is a difference with the import part of it but it should work on your car.

Yes it will, you will have to call NX to get the correct jet sizes for your car, as they will not be listed in with the imports ( obviously). They may even have the jetting listed on their site..

The kit will come with the correct jet sizes. Import or domestic makes no difference in the jet sizes. It comes with 50 and 75 horsepower jets. I have purchased 7 of these kits and they have all been the same. I've used them on all kinds of cars, Focus, Eclipse, Civic, Mustang, Rx-7, Supra, Cavalier. The non-import kits just come with more jet sizes. 50-150hp instead of 50-75hp. Make sure you are getting a wet kit, and you should also get an rpm window switch.

The jetting is not always the same on every car, it varies from model to model, The jets he needs are probably with the kit, its just that the jet listing in an import kit will not have a foci listed, that's all. The kit , however, will work just fine.