I do not have them in my vette but I have had them in a few cars. I have two commuter cars that I started running K&N filters in since new. Both vehicles have 70K+ mi on them since. Each car has a 4cyl and your results may vary but the throttle response is a tad better at lower rpms... no increase in fuel mileage... with the nice part being that I dont worry about cleaning them until about every 30K to 40K mi. If they produce more HP... well, I could never tell. They are oil wicked so be prepared that you may see oil lining your intake after time. I use them just to save $ on my daily drivers and have also thought of putting them on my vette... but I probably will not. I am saving my pennies for a vararam intake. Hope this helps.Is it worth putting in those two drop in k and n air filters for about a hundred bucks for both. Has anyone done this. Is it worth it.