Blackwing and K&N Aircharger are virtually the same as Haltech. Open up the bottom of the shroud and hold about 3" open with a variety of props, and you will get only cold, outside air to the filter which hangs down in the airstream. It will be worth at least 15 rwhp--more as you increase speed, over just the filter CAI. 1 degree cooler to the intake = 1 hp. The shroud does not have to be modified in any way and can be returned to stock position in 15 seconds. Lots of threads, "Free cold air," on doing this. May not get quite the increase of the VR, but I didn't want to cut the shroud, and the VR quality has been in some dispute. Good luck! :thumbsup:If you want a simple drop in go with halltech which what I have and only one available back when I got it. If you don't mind cutting go with vararam, which I will do if I have to buy now.