Originally Posted By Cab_Burge
I had mine welded in on the head pipe side going towards the rear of the car right at the collector flange with a full length 3.0 inch exhaust system with straight through muffs mounted at the rear bumper behind the rear end up
I ended up making it a dual wide ban system later so I could read both sides at the same time before adding the hardware and software to read both sides I would swap the O2 sensor from side to side realcrazy
My message is do it once and do it correct with both sides working from the start up

i thought about that also , you watch shows install a O2 senor on the pass. side of the exhaust i was work what about the driver side, it`s not like a factory car where the left/right come together into one