Installed an Airaid CAI today. The instructions provided are great and the install took about 30 minutes. I drove about 150 miles today with it and was thorougly impressed. The lack of power is gone now and I can actually accelerate going uphill again There is a whistle right at 2000 rpms but that's the only spot I've heard it. There is definitely a growl to it I showed about a 1.5 mpg gain but the entire trip was right at 75mph with no top or doors on. The cruise control was allowing it to slow as usual while climbing but when I stepped on the gas, it slowly gained speed. Well worth every penny!!!