Now my car has developed a weird hesitation when acclerating. Car is running rich like woah...I can smell the fuel. My search on honda-tech has confirmed my suspicions that the problem is most likely my o2. From my visual inspection of it from the month or so I ran my car open downpipe...it was not in the best of shape. The thing was blacker then me lol. It is not throwing any codes yet but my gas mileage has gone to shit. How much does a stock replacement cost and where can I get one?