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i recently installed a magnaflow catalyac converter 2 months ago on my car and now it looks redish and rusty like its burning? why does it look like this all the other pipes still look new? can it be a bad oxygen sensor causing this problem?
 

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i agree take that smog crap off. also check plugs, wires,timing, o2 sensor and make sure your carb is good and not in need of adjustment or replacement.
 
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