hey im looking at o2 sensors for the xerd header.. i got bosch 11027 universal ones... they have a black wire coming out of it .. but the stock ones have four wires.. a white, blue, and 2 blacks... i knew uhad to splice but after seeing 4 and only 1 in the bosch i dunno what to do... im in middle of it now so if u can help id appreciate..t hanks!