hello i have just bought a 02 falcon ba sedan the fuel goes good but i want to get more out of it can you please suggest to me what i should do to help its fuel? example. 2.5 inch exhaust and al them types of mods im prepaired to spend money if it will pay for its self in the long run and with the exhaust would a twin 2.5 be better then a single 2.5? or would the twin just make it louder?
Cheers
Cheers