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I got an extra set of mazzuri headers for sale. I was gonna swap mines out cause it has a leak, but my O2 sensors are stuck, and I don't wanna buy new sensors, so I give up. $500 shipped.
sorry, no sim, but the one that i have on my car was defective too, so i dunno... i've just been running it with the CEL. i've tried putting anti-foulers on the sensors, and i noticed the reading went down, but not enough with the leak i have on them.