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Old 11-10-2012, 02:27 AM   #2
Focus Fanatic
Join Date: Mar 2012
Fan#: 96610
Location: Fort Worth, TX
What I Drive: 00 wagon, 02 sedan both zetec atx

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They will not be as big as you are used to looking at in other motors, nonetheless they will work well. 4 valve engines do not need as much lift or duration since the open 'window' area of the combined valves is bigger than a 2 valve motor. A big reason why zetec makes 20 more base HP than the SPI 2 valve motor.
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