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puttin a free flowing exhaust on and an induction filter will cause the car to use more fuel think about it "more air in will require more fuel with a fast exhaust output will cause the engine to flow better using more fuel due to more gases being expelled"


on my old xr2i on stock running i was getting 300miles to a tank a full exhaust from manifold and induction dropped it to 175/200miles and bhp went from around 90bhp to 110bhp


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