I ran FI catback exhaust and FI HFCs, along with a Stillen Gen 3 CAI without a tune on my daily driver for a year, no issues. I got an ECUTek tune because I wanted the racerom features and to be able to say I'm over 310whp, really no other reason.
I know everyone *says* you need a tune with three breather mods, but no one ever says *why*. From my anecdotal experience, I say don't stress about the tune. Get it when you want it, if you want it.
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Fast Intentions 18 inch resonated catback, Fast Intentions resonated HFCs, Stillen Gen 3 CAI, EcuTEK tune, 311whp
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