I didn't know where to put this, so here we go. CAR:88 CRX Si w/B16 (which is for sale by the way) I got a Matrix 4-2-1 header from a friend of mine but he bottomed out the downpipe so the guy who is going to do my exaust piping said he could cut out the sections that are pinched and weld in some new piping and just use the flanges. anyway, i'm going to ask him to weld an o2 bung on each downpipe. Now i'm running a pr3 and the Hondata website says if you are running one o2 to just unplug the o2 so the car doesn't run like shit. I want to run both o2's but if i can get away with running one, i will. The downpipe already has 1 o2 bung but that's at the collector and Hondata says each o2 needs to read the exaust for each cylinder pair. So anyone have an idea of what i could do and if anyone has just wired both pin slots to 1 o2? any ideas please.