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so my z has passed smog. time to take the cats off =) im getting some labree 2.5" test pipes and my car already has hks hi power exhaust on it. im just looking for a little guidance on what to do next. i mean obviously downpipes and what not. but ya, i'd like to get some suggestions. i was interested in the downpipes that start at 3" and taper down to 2.5" . sound good? or should i just go straight 2.5" all the way.also, the test pipes would not only replace my cats, but the resonators in between the cats and tips too??
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