Has any one tried one of these, i know its a bit dodge but prob better than the local tune shop. Think it UP performance doi g remaps here. Not sure about them either. Would just love the car to rev a bit deaper and the speed limmiter removed. Seems like the f1 revs deaper and i find myself on the limmiter very soon in the rb8
If your car is standard, no modifications, then it might be okay, but if you have anything added like a different air filter, decat etc etc, then i would get it on the rollers and get it mapped that way too be 100% sure its right.