The filters hug the bottom of the center panel. Actually, looking into the "mouth" of the front valance you can't even see the filters at all, they are obscured by the bumper. The Apex or HKS bov's would fit no problem. The only challenging thing about doing it is that I had to pull the drivers side headlight to get at one of the bolts that holds the OEM tube in place. But it wasn't that hard.