1 definition by smithter

Top Definition
BFI
BFI means Big Fucking Intake.
It is the action of turning your normal air intake on your car into one that has the ability to suck in more air, therefore providing more power.
Ay dood, I jus did a fully hektik BFI on mah S15, I can now do drifts maight.
by smithter December 11, 2010

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