I am in the process of installing my Pacesetter Long tubes with their ORY. There are 4 o2 sensors the headers only have two connections and the y-pipe does not have any. What do I do about the rear two. Do I need to weld in the nuts into the y-pipe or can I just leave them off completely and erase the code with LS1edit. need help asap thank you

 

You need to pick up two o2 sims, or delete the code through ls1edit.