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it should be as close to the collector as possible. The rear o2s are off with the tune. You could remove the rear o2s and plug the holes. you have to put the wide band between 10 and 2 o'clock when looking at the header so water does not ruin it. I wouldnt put it in place of a rear o2.
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real ZL1 wheels and brakes, 285/305 Michelin Pilot Super Sports, Pray ported Intake manifold, Soler Throttle Body, Rotofab intake, EFI Tuning Flex fuel kit, full American Racing Headers Exhaust, 1 7/8" w/ cats H pipe and mufflers. Full 1LE suspension, with BMR adjustable sway bars and links, GM aluminum cradle bushings, Hurst shifter with lighter reverse spring, TWM shifter knob, Tick level 1 transmission. I should have bought a ZL1
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