I bought a bluefin today for my rs and a filter k&n, I’ve used bluefin on my fiesta st and mk3 st so thought I’d try it on my rs mk3 1800 miles, uploaded the map and put it onto the car, 5 mins on test drive car went into limp mode and service car notification and no boost, so I got in touch with superchips they emailed another map, no prob with it then but hardly any difference so its going back tomorrow and keeping the car standard