I put Dc headers on my 95 accord non-vtec and put the 4-2-1 vtec headers on cuz well they were cheap and I did away with the oxy sensor cuz there was not a place on the headers and I didnt want to drill a hole, I didnt try to relocate it with the pigtail, got the pigtail after I threw away the oxy sensor from stock manifold, I just got rid of it period. I have to drive my car with the check engine light on, but O'well man I do have dc sports headers on my car. Well I know its prob not what you were wanting to hear, but put the damn headers on or return them.

Later