The drop in AFE looks a lot like a K&E filter & both fit like the stock one. The pleats are deeper & evenly spaced. I've used stock, K&E & AFE Pro7 in the stock box & an AFE conical stage 1. I was pulling the filter minder down with stock but all the aftermarket filters didn't do that. I didn't see any egt changes in any of them the way I drive.