I am not an expert in the Air Filtration field but I do know that extreme caution must be taken in selecting and installing an Air Filtration replacement system
-So may variables to take in account
-If only looking for performance and not necessarily Clean air than great
-However for engine protection and longivity the two must be balanced
-I myself was looking at replacing my Factory Stock air
-But after doing my independent research I decided to stay Stock air system and use the money on the Exhaust side ( Banks or MagnaFlow ) a person can get better performance for the dollar in my humble viewpoint with upgrading exhaust --- plus wont need to care about filtration
-However if I was ever to one day purchase a Air intake for factory replacement --- I would purchase the S&B Filter kit --- take a look at web link
S&B Filters --- read the technical specs and notice they test to ISO 5011 and have hard data to back-up their claims --- S&B in my viewpoint does a good job of balancing the Clean air filtration with volume of air
-My suggestion would be to take the AFE back and apply dollars to Upgraded exhaust system
-AFE makes some pretty bold marketing claims --- but were is the technical data to back it up with --- how clean truly is the air --- dirty air will damage your Turbo and internal engine parts big time if dont select proper Filter
Just my two cents worth --- hope this helps a bit
Have a great one
John from Colfax NC