What\'s your horsepower gain with just headers?
Anyone added headers alone and either dynoed the difference or seen a consistent ET gain? What'd you see? Trying to determine the bottom line on header hp gain.
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1999 GTS / 11.80@120
Anyone added headers alone and either dynoed the difference or seen a consistent ET gain? What'd you see? Trying to determine the bottom line on header hp gain.
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1999 GTS / 11.80@120