Most window cleaner will leave a film on the glass which causing fogging. Try using car wax on the inside of the windshield and that should clean it up and make it not fog up any more. Works great for me. Just don't do the outside or the windshield will streak when you use your wipers.
Did you disconnect the negative battery cable while you were doing the install? This will reset the ECU and it will re calibrate the A/F ratio based on the new intake.
Definitely have some increased wind noise with them installed. I use them so I can leave my windows cracked in the summer time and I remove them once the weather turns cooler. I have done this with the last 3 vehicles I have had.
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