Forum Discussion
donn0128
May 06, 2016Explorer II
Headers alone will never increase fuel economy. It is what it is, and nothing short of spending thousands will gain you 1MPG. Headers alone will do nothing but lighten your wallet and make for a louder driving experience.
Most gas motor add ons are designed to increase HP, and at that only in the higher RPM range.
Most gas motor add ons are designed to increase HP, and at that only in the higher RPM range.
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