Thread: secondary cat removal = more HP?
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Old 10-19-2019, 11:25 PM   #7
Red Beard
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Drives: Chevy colroado, Gmc yukon
Join Date: Aug 2019
Location: Ca
Posts: 20
What sort of gains are made with hi flow cats or catless? I’ve been debating this as my next step, but haven’t found any info.
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