I recently got new pacesetter headers for my 2004 gto. I now only have one 2 holes for my 4, 02 sensors. the front 2 sensors will not reach but the back 2 will but some people(who were not to sure on the subject) have told me i only need the front 2 plugged in and the back 2 dont matter.If this is true i will need to buy the extenders but would rather not if they are not needed. Can i get some other opinions on the matter?

 

you will need the extension and put the front o2's back in,, the rears you can leave disconnected but you will need the pcm tuned for this or your SES light will be on