But since I already have the hfc's will that be a problem with this tune? If not, can it be retuned afterwords to include the cats or would it be recommended to wait? Or, for that matter maybe go with another kit once they are released? Rcz mentioned something about this kit being unmodifiable. Again, does this mean that I can't go back and make adjustments to include the cats?
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'09 Solid Red 370z with Stillen CBE, HFC's, and Gen 3 air intakes
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