Would either of you guys mind sending me images of the extra brackets you got? The only thing I can think of is that they may have sent you brackets to relocate the power steering lines like the Cobb unit comes with... also, those brackets dont look like anything more than aluminum stock bent right, should be no issue to have them fabbed up for you from someone local to you guys, but for what its worth, 2 should be fine... have had the Cobb unit on my car since late 09, it only has 2 brackets that hold the core, and I've never had any issues whatsoever, and theyre on the sides not the top or bottom.