Can anyone explain this? 2014 GT with 2.3 Whipple, 20lbs boost, AEM wideband located opposite of factory wideband in same pipe. Steady state both factory and AEM wideband read the same. They will mirror each other until boost is introduced into the mix. At WOT the AEM will read 8% leaner than factory. I have my ideas but I am looking for input that might lead to a real cause. Any thoughts welcome.