A definitive answer to youre question is almost impossible on this site. There are many threads on this subject.
I'm the one who just bought and installed Camarodriver K&N CAI posted above and I like it a lot.
Prior to that I had a G5CR which I beleive it's top quality also. I took it off because the company doen't plan to offfer a HEATSHIELD.
Mine if out since yesterday and I will sell it for cheap as long as you're willing to get a heatshield DIY.
I paid over 300.00$ and will sell it for 150.00$ + shipping.