need answer quick!!! I have OBD1 (1 o2 sensor) getting DC jdm 4-1 header.. 2.5 carsound cat... Should I use the header o2 sensor and have them plug the cat.???

 

Do you have a GS-R or an LS?

The GS-R uses the O2 sensor in the cat, the LS uses one in the header. Do it however the factory did it and you'll be fine.

Actually, it really shouldn't matter either way.

 

i have type r... 96 JDM... i only use 1 02 sensor... will it be fine if i plug the carsound cat sensor housings and I use the header.?? right now.. i have dc 4-1 2" into stock cat. the dc 2" header i have now has no o2 housing

 

Yes.

 

install it on the header.