i got the x cal2 the other day and i was wondering if the tune that evolution performance put on it would stay on the tuner forever? so if i want i could return the car to stock and then program their tune back in whenever i wanted?
thanks
max

 

sorta... the tune from the xcal is uploaded to your ECU, your ECU's tune is loaded onto the spare slot on the xcal. When you go back to stock the perf tune is still on the handheld so you can re-apply it any time later on. So yes...you're mostly correct.