What does it look like if you drive an exhaust system without ABE and without registration like to the Besipiel a HKS Hi Power or a Nvidia N1 etc. Do you get them registered at all or there is no chance at all? What if you drive them without permission, what can happen to me in the worst case? What experience have you had so far, there are so many people driving around with such systems and I always wonder how to do it without having to reckon with problems. Would be great if a bit of feedback would come!