Ford Focus Forum, Ford Focus ST Forum - View Single Post - ORP vs. Super high flow Cat
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Old 10-01-2007, 07:23 PM   #2
Slow n lifted
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you might get away with a visible inspection depending on how good they look. But in theory you wount pass emissions. With the HFC you will pass emissions. and cfm did a test to show the difference and the orp and hfc were very similar in performance gains
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