MAC header question

My question is, how do I bolt these on? Will the ory bolt right up to my catback or my cat? I've read that I might need an "S" pipe, but I've also read it will bolt right up. Or is it completely different? Im fine with losing my cats, I just want a definitive answer so I have everything together before beginning the install. Thanks guys
Last edited by jlpz; Jul 1, 2013 at 01:24 PM.
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