Yes, b1s1 signal wires merged to b2s1. b1s1 heater wires can be wired to a dummy o2 sensor so the ecu sees a power draw. In my case I don't need to do that because my boomslang harness has resistors in it that allows me to merge the wires without throwing a code. For people who don't want to mess with resistors, I gave an alternative that works.So that B2S1 o2 is the one you merged B1S1 into right? Then you have the downstream O2 deleted with sims? Thanks for your help.