I have been waiting for someone to mention TRD. To me, this type of issue is just another reason to get it. Dealer can raise no objections with it. No warranty issues. No Smog issues. No fit problems. At least as good as any other CAI on the market IMO.
I had a problem smogging my T-bird once. Dealer said the MAF sensor was bad and sold me a new one. It was reading "'out of range"
The smog guy told me that just indicated that it was dirty and cleaning would fix it. Long story short the dealer refused to give the old part back and refunded the $300 they had charged me for the new sensor ( I kept the sensor).
I agree with the poster that (many) dealers are fos, and will say/do anything to milk your wallet.
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2007 Tundra SR5 DC 5.7 Superwhite & debadged
Truxxx 3 & 1 lift <> Unichip <> Gibson single cb exhaust <> TRD CAI <> Aries side bars <> Carriage Works replacement grill <> TRD anti sway bar