Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum - View Single Post - how much power will the svt header and a borla cat back give me?
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Old 01-03-2008, 11:03 AM   #9
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Location: los gatos , california
What I Drive: 2001 infared zx3

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well if i did the factory intake (SVT) box then the cat back should be good rite? whould it be best just to add a cat back to the stock zx3 header and cat and flex?
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