Thank you TopJimmy, I saw failed design but with potential and they weren't willing to fix it. I was hesitant at first to even think this would be an upgrade when looking at stock cat versus the un modded AA catted down pipes. The way I first received the AA catted downpipes I don't think it would be much of a upgrade, but after modding the down pipe it's able to use more surface area of the cat easily. Stock on top and modded AA on bottom.
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