Zeitronix ZT2 Zt-2 Wideband Kits No matter if you have a stand alone engine management system, a piggy back fuel control or a carbureted engine. The Wideband Air Fuel Ratio Meter is a must for a serious tuner! Finally you can tune for more power, closer to the edge, precisely monitoring Air/Fuel ratio Boost, EGT, RPM and throttle position datalogging up to 9 hours of data with a blazing rate of 74 samples per seconds per graph. The ZDL software can be utilized as a real time display when using a basic Zt-2 kit without the hardware display.