I hope I'm not setting myself up for disaster by asking, but what is the issue? I've read a few posts that indicate disaster upon installation of a high-flow filter. It seems that the common concern is lean operation and potentially knock? I've read that the air intake isn't the bottleneck until a stage 2 or 3 level, so I can't imagine that it would flow a lot more air. What causes a higher flow filter to result in lean running? Is it related to MAF contamination? I guess I'm just surprised that a modern engine control system with knock sensor can't adjust AF and timing enough.