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What seems to be the problem? If the cats are causing codes just toss on an O2 Sensor Simulator. It's even plug and play, can't get any easier than that =)
good info...I think I am going with the Crawford's too...but what is the CEL fix for the Helix? Is it the same wire in fix that I had on the WRX??? Just wondering...
I've got an 05' (Performance) and have been running test-pipes for well over two weeks now without a CEL. Just search for and use the "Help!" method. Works like a charm.