As most of you know I am new to the ford world and the mustang world. I am slowly modding my 08 gt. I currently have slp loudmouth axle back and k&n drop in filter.... My soon to be next purchase is either a off road h pipe or x pipe, and mufflers to splice in. Does this require a tune? if so I will wait till i get intake. and are CAI worth it vs a drop in?? Thanks guys!