Srt has a true 5V wideband. Supposedly you can get a Greddy E-01 and tap the wire for the O2 sensor then set the voltage range in the E-01 for it and it becomes an O2 wideband reader. The catch is you have to fig. Out the max and min voltage reading and put that into the E-01. No one knows what those readings are and no one seems to know how to get them.