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Catalytic Converters
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Question
Chapa
So I'm removing 2 catalytic converters off my 2008 gmc sierra and adding a Flowmaster to it and I don't know how many cats my truck has since to pass inspection I need 2. So I have 2 questions, 1: how many cats do i have in my truck and 2: is my truck going to be loud.. answers asap please. Thank you
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