I have read several messages on the board here regarding K&N filters and the other brands out there and from what I read it appears as these are generally accepted as "worthless" on a Corvette. I'm wondering if there is a good system recommended for my C-5, or do I just leave it stock? I have used K&N and the "green" filters on othere cars with no problem, but it appears there is more to it than meets the eye!! Thanks