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exhaust ideas
I was wondering if anybody ever tested the difference between stock exhaust manifolds, short tube headers and long tube headers for the gas mileage. I know that anything but stock exhaust manifold will gain more power, but what about the gas mileage??
Me thinks long tubes will get better gas mileage, because they'll help out low mid torque, but I've been wrong before, and I'll like to hear your opinions.
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