I was issuing emissions codes P0420 and P0430 on my 2008 F150. I replaced all 02 sensors, spark plugs, etc. No luck. I ended up ripping out the cats and installing it and it fixed the problem right away. Before that I had Magnaflow "Hi Flowsโ installed. I would stay away from them. They started giving out codes within 3 months of installation and my installer said they burned out completely in less than 2 years. In my opinion the high flows didn't give a performance boost and wasn't worth the stress and trouble of causing failed emissions every year. Just my 2 cents. I can't say how long they will last but if they fry after 2 years like Hi-Flow did I will update this review. So far there has been no change in sound or loss of performance when reinserted.
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