Do ineed this guage with a VEMS setup, quick answer needed

[JT]

Hi i have just seen an advert for this guage VEMS Wideband O2 monitor with optional EGT Sensor, my question is do i need this for a VEMS setup on an E30 or am i duplicating the system, thanks, John

[dnb]

You don't need it to run and tune the engine.  The VEMS ECU has a built in wideband controller and monitor.   

[JT]

Thanks for quick reply