don't know the difference in the core, but If you order it from summit don't expect it for a long time. Even though the estimated shipping says 7/23/06 it will be much longer, which happened to me before.
i did but my parents don't like the sound so im thinking about the magnaflow because it sound s a little more performance and my dad is a big performance car type so maybe he will like it better. but so far still running the dumped summit turbo and just as happy as day one
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