Think of it this way. with the CT-E stage 2 it comes with just a reflash so that your car runs fine without problems which is done to your stock ECU Flash pro is a plug and play systems where you will be able to Tune your car adjusting different features. This is why if you want to get Flash Pro to further max out the performance of your car they are going to credit you $150 dollars to upgrade from the Reflash ---->>>Flash Pro. :thumb: