"Are you really trying to tell me you're getting 9 hp by eliminating the airbox? I'm having a very hard time believing that is real."

nothing to gain here - that's what the read-out says. Remember too that dyno's are done with no help of 100 mph + of intake air being ramed into the intake like on the track. Mile ran it with and without the air box just to get a comparison.....Also, all dyno's are relative - we were just trying different combinations of stuff - headers, mufflers, resonators, looking for anything to give us that extra hp / torque. On another dyno I could only show 150 RWHP. I was able to tune my exhaust this time for a little more torque.

Mark