I will add a post script to that. I knew what Bucko says is true and that the stock airbox was better than the CAI, being it is a ram-air feed cold box from the factory. I did research and that was the story.
I got a tune first on the stock airbox and that was great. I added the Steeda CAI after the stock airbox tune and guess what, it did have gains. Talk to "Rod" at Steeda if you need info.
Edit: that's the reason its the only one that "requires" a tune to use because yes the MAF area in the Steeda tube is larger
PPS: Yes after that part of the tube, some say it forces the air into a smaller Throttle Body. But It has improved MID Torque (2.5-3.8 rpm) in my ride on several test runs. the only sensor unfortunately has been my *** in my seat , sorry
Last: The Steeda CAI also is one that gets feed also from the "grill ram air" feed that the stock airbox gets air from. It has the "grill feed" on a connector on the bottom the same as the stock box does.