All Power Vision returns and/or adjustments must be made directly with Dynojet Research Flash performance tunes via OEM diagnostic connector, no need to remove and send out ECU High contrast display, viewable in direct sunlight Spark timing optimized for 91-93 octane fuel Display vehicle data channels in real-time Weather resistant for use in all conditions Plug-in OEM style connectors Speed limit raised Rev limit raised Made in the USA. PV-3 YAM WOLVERINE RMAX 21- CARB