You'll find both of those piggyback and flash tuning alternatives obtainable for the N55 and the decision on which tune to run is totally own preference. We received’t go over the intricacies of N55 tuning below, but we have prepared committed N55 tuning guides about both BM3 and MHD N55 https://www.pdffiller.com/jsfiller-desk10/?flat_pdf_quality=high&isShareViaLink=1&lang=en&projectId=2077462513&isSkipEditorLoadFrequency=true&jsf-fake-edit-embedded=true&jsf-socket-io=true&jsf-disable-autosave=true&jsf-fake-edit-stream-editing=true&richTextFormatting=true&jsf-redesign-full=true&acc-header-redesign-2=false&routeId=5b3f4d7a7324e8a72f11cb6d3542d350#3d31bafc91394e3a95c35ebcbb35c7f5