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I replace my Airaid with my factory box(with K&N drop in) I can say if mostly city driving the factory box is much better. Especially in low rpm, the car pick up faster and more response. With the Airaid it always feels there is a lag in low-mid rpm. Every time you step hard on the gas in low rpm you can see the rpm goes up another 200rmp but the car seem cannot pick up right away. But Airaid pull better above 4k. If always keep high rpm the Airaid is Excellent.
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