Cadubya
Autocross Newbie
I think its just because they havent been tested for ROW fitment but imagine that wouldn't be an issue. Just keep in mind the tuning for these are really specific, its not just adjusting injector timing, it takes changes in the ecu as to how the injector is electrically controlled(kind of like dwell time on an ignition coil). Problem is most tuners dont know how or have access to the changes that need made.
I’m currently collaborating with Cobb and Nostrum to create Cobb files matched to Nostrums injectors and HPFP. Should be available in the coming months.