California. And the whipple ecm has several diff methods of tuning has two extra injectors to add fuel under boost well over 200gps maf reading and then monitors 02signals and serial connection yes I got it working the v2 reads same afr as wideband gauge itself. Some whipple kits required ecm tuning some did not. The engine also NEVER goes into open loop. Engine has very serious pre ignition issues causing engine damage. This is the third engine in a year truck pings big time under even 1psi boost.