This is a knockoff brand and I question their quality honestly?? The best quality high flow catalytic converters I installed were the AAM Competition high flow catalytic converters and they lasted a long time 120K+ miles before I removed them and sold them. I highly recommend installing the AAM Competition high flow catalytic converters they fit like a glove like they were meant to be on my Z, were top notch quality,and lasted a long time.
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