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 01-02-2008, 04:48 AM   #4
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Do you have an intake? I/H/E usually nets about 10-15 as previously mentioned, but with the restrictive stock intake setup I'd guess something closer to 6-10.
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