thats a stand alone .. it replaces ur stock ECU
i bought one (WOLF) .. waitin to install it .. hasn't arrived yet
its REALLY good wen runnin boost
it eliminates all the restictions that the stock ECU causes
it's for better ignition timing fueling and maping to tune for higher boost or even race gace C10 or higher
u can use it with a N/A set-up for fuel and ignition
AEM is one of the BEST .. just MAD expensive
