I just ordered the hi flow filter element for my 08 6.4 instead of the entire intake system wich was only $ 104 cdn. instead of over $400 for the entire kit. Makes alot of sence sine the stock replacement filter is almost just as much so it pays for itself on the first air fiter change any extra flow gains + performance after that is all gravy . will let you guys know it goes
Leave the lid off the filter....you'll be pleased with the sound. Yes, you'll be sucking in some "warmer" engine air when you're not driving, but the sound is pleasant to the ears...