RLS....In my duals I used the orig 02 sensor position as I used the same crossover pipe ,simply welded A CURVED PIPE to go to the the rear to connect my exhaust pipe to.... I will be putting the 02 sensor in the same place........with my headers.... My mufflers are big walker universal ones....fairly quite...our floor temp seems to have cut down a bit. I really want to get rid of my tailpipes....Iam using the orginal ones ,exit on DS....I want to exit on PS between propane tank and duals....have to study this to see if I can fab a double layer aluminum heat shield around the pipes between the two of them.
tom