Question
I have an 07 f150 5.4 4X4 with cai and e-fans. The only other mods I want to do are the programmer and the exhaust. Problem, I am on a fixed income, disabled law enforcement. I want to get the programmer now but then I wont be able to get the exhaust for at least 7-8 months. If I get the programmer now with the custom tunes, will I need new tunes when I get the exhaust? How much difference will the exhaust actually make? Any ideas would be appreciated.
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