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what size cat do i need???

878 Views 0 Replies 1 Participant Last post by  b18bhybrid
I am doing an LS swap into my honda civic ex. I currently have 5-zigen 2.25 inch piping with a stock ls header.. what carsound cat should i be getting? i was thinkin 3.0 inch since i'll be getting a turbo soon but not for another few months.. should i just get the 3.0 inch anyway or do i need different one? thanks
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