yep. the bank 1 sensor one (right on the rear header) is the only o2 that has anything to do with fueling. the other sensor is only there to tell you if your cat is working or not. so the only thing the o2 emulator is going to do is turn the ses light off. If your planning on keeping that setup for a while and want the resale value to stay up there in case you do want to sell it i'd get the stainless. When i bought the 2.5 bolt in offroad i got mine in stainless.