Where can i purchase a cheap but god wide band 02 sensor for my evo8 plug and play ems. I was also wondering if the auto tune feature will work with my stock 02 sensor? If i buy just the plug and play aem ems will it come with the sensors i need to use map? What is a UEGO controller and do i need it? And what is a wide band 02 controller and do i need it? IS it just as easy to buy the aem ems without the controller and just buy it later and install if i need it?

 

the evo ems is offered with the built in UEGO.. uego=wideband..

imo the ems is pretty useless with out the uego. the ems wont work with teh stock sensor, stock sensors are NO good for tuning anything.