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I not really sure how an aftermarket CAI is such an improvement over the stock intake. Basically an aftermarket CAI is just a cleaned up version of the OEM.
It wasn't that long ago when the stock intakes were inefficient and poorly designed. Often allowing air through a little gap. The aftermarket CAI opened up the air ways and allowed a substantial amount of air into the engine. It was a simple, easy way to bolt on an extra 15 to 20 HP. As a result, its become a tradition to install a CAI on a performance vehicle.
But today, with the power levels we are talking about. The 15 to 20 HP increase is not very significant and could be matched by other simple factors. In the time of 4th gen Camaros and 5th gen Corvettes with about 300 RWHP, an increase of 20 HP made a difference. But 20 HP on an LT4 its hardly worth the hassle.
Sure they make the engine bay look nice, and increase blower whine. But is that really worth the cost? In California an CARB EO number is required (no aftermarket CAI makers have one now), and it could impact your warranty if the Dealership finds out.
Finally, its your car to do what you want with it.
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