ITS A "RICE ROVER!", quote me on that one. Nah, Gas Milage up 3, uh huh........right. Also new Sparks dont do anything except a quicker fire rate on each piston turn and thats about it. As fas as a standard K&n goes, nope no HP there, as noted above maybe 1 HP. Now the Air Charger Kits and Cold air intakes are a different story but remember the X is not a racer, you silly ricer. X's arent for kids!