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Re: FLP Headers...did your MPG decrease in your vette.. (Tripleblack51)
Freeing up your exhaust system by replacing the junk stock exhaust manifold with headers, I suspect you'd be more likely to increase your engines efficiency, not harm it--thereby increasing gas mileage.
I HIGHLY doubt that headers could cause a negative impact on your economy. :cheers:
(I was pulling 32MPG hwy with all mods until the cam and heads went on--now I'm down to an estimated 26-7 hwy :eek: )