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Old 11-01-2012, 10:45 AM   #462
Crystal_Imprezav
Scooby Specialist
 
Member#: 84105
Join Date: Mar 2005
Chapter/Region: SCIC
Location: I'm a Newbie
Vehicle:
2005 Super Slow STi
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But if you are using +1 valves you should open the throat up with a 75* bowl hog cutter to 85-90% of the valve size. You could grind it, but its much faster and accurate with a cutter.
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