you dont need a cat unless you have emissions testing in your state, if you have a 97-00 then you can put an O2 sim on your downstream o2 and have no problems if you have a 01+ then you need a tune
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you dont need a cat unless you have emissions testing in your state, if you have a 97-00 then you can put an O2 sim on your downstream o2 and have no problems if you have a 01+ then you need a tune
too easy, 45$
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