OK guys. Before I installed my BBK CAI for my 07 V6 stang with 22k miles, the engine sounded very throaty in 4th gear at mid - WOT. When I installed the CAI, the throaty sound not only got louder, but it continued in the same throttle range, but now 2nd - 4th. 1st & 5th gears sounds clean. I guess I may have confused this throatyness as knocking, but am not sure. Is this knocking/throaty sound normal? My 05 v6 4.0 Ranger did not sound like this and this is my first stang so I have nothing to compare to. I started noticing this a few months ago at around 15k miles. I also removed the CAI and the sound is not as loud, but still present 2nd - 4th gears. Also, this is a manual tranny. Thanks