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DURATEC Performance (2003-2011) The place to chat about any Duratec 23, 23E, and 20 engine performance, tuning and exhaust related upgrades.
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#11 | ||||
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Focus Enthusiast
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I have the same issue with mine with the K&N on a 2011 SE. I had the same exact problem when I had the FSwerks cold air, when you hit 1500rpm it struggles. I have a tuner from Tom, just have to find the time record my driving so he can make me a custom tune!
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