besides jdm b16 header does anyone know what header i can use for b16 crx (what model) i heard 99 civic si, but i know the header needs to have two o2 sensor holes.

 

The Civic Si never came with a Header... The JDM 4-1 ITR header might be a good choice for you, its a nice, OEM quality header. You can always get the o2 bungs welded in it too, or any other header for that matter.