My K&N came in yesterday and Here is what I think. I have worked with many blueprints and I found the one that came with it could have been better. I like to meet the guy that said he installed it in 10 mins!
As far as the sound goes, you don't even know it is on unless you have a lead foot and yes it makes a great rumble if you get on it. Here is what the wife said "It has a slight bit of a grumble, but once you hit 70 or above it mellows out and purrs".
Now to see how it does on MPG when we take our trip this Friday...