If memory serves me right, the GruppeM is $800. And, if the pictures are accurate, the assembly just mounts off to the side and does not draft cold air from under the vehicle.

Knowing all of this, it seems that all of us 4.6 guiys have only one real CAI option: Dinan.

However, I need to spend some time under the hood to see if there is a way to fabricate a CAI system that uses a K&N cone filter and can be placed as close to street level as possible via some ductwork.