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Will a good exhaust help with mpg, if so how much? I have a 2004 ram quad cab with a 4.7l v8. Installed air ram, throttle body spacer. Tryin to gain mpg can anyone help??? If exhaust will help whats the best/economic?? Thanks in advance!!!
 

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Duels CAN help with better MPG, if you keep your foot off the floor. (like all mods)

They will NEVER pay give you pay back in $ savings!
 
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