I have a 2004 6s and i did the airbox mod about 6 months ago. I felt a difference in the power and i had taken off the tube part so it was more like a SRI. But then i found the tube part again sitting around and so i decided to play around with it and i cut off the piece that locks it back into the airbox and turned it upside down. It fits snug enough and so i took it for a test drive and i felt an increase of power throughout the whole rpm range and especially in the higher rpms. The sound is also a little louder which is sweet, but my question is... is it safe? Now it is like a CAI because it sucks air up from under the car. thats all. just wanted to know if it was safe. cool.