Neither, doing that is most likely worse than stock box as far as heat into manifold. But you will get the sound.
Leave stock and add kn filter to stock box or just keep saving for Stillen G3, AEM CAI, Nismo CAI, Takeda etc.
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09 370z 6spd traded 1/12/15 for 15 Challenger RT 6spd
Last edited by 7speed; 05-28-2014 at 04:29 PM.
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