after selling my b16 hatch, i now plan to swap my crx. I want to get the megan ss Header for a 99-00 si, but it has only one o2 bung. In my last hatch i had o2 bungs welded into the dc sports header for both sensors, but i dont want to do that with this header since it will look ulgy. Is there a chip that i can use to chip the pr3 ecu and run one o2 sensor in the stock location on the si header? or no o2 sensors at all?

 

Yes chip the pr3, then turn off the second o2 in BRE. Good Luck!