You will find the two piggyback and flash tuning selections available for the N55 and the decision on which tune to operate is fully particular choice. We gained’t go over the intricacies of N55 tuning here, but We have now prepared dedicated N55 tuning guides about equally BM3 and MHD https://suave-pike-332.notion.site/37ba984643cd80c19faad1b83b82b1d3