Cold air takes less space than warm air, therefore in the combustion chamber you can fit more gas. More or less, this should be the idea behind CAIs.
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2013 PW 370Z Touring+Sport, NAV
Tint 35% side, 18% back | RJM clutch pedal | ZSpeed SS lines | Stillen Gen3 CAI | Fast Intentions HFC and TDX 12'' CF CBE | UpRev
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