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Old Jul 14, 2008, 04:30 AM   #24
Kracka
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2006 Mitsubishi Lancer Evolution
 
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Join Date: Apr 2007
Location: The Colony, TX
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You don't NEED to upgrade your valve springs, but these cams will be pushing your stockers to the limit so its probably not a bad idea. If you are set on keeping your stock springs though you can rev to the factory redline and should have no issues.
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