"so i smashed in my k&n a little with my wheelie bar mount now im looking for a diffrent air filter setup. im running a stock boot with a sblt adapter foam filter would give a little it it hits bar mount was just wondering about diffrence in flow. what are ure thoughts im running a 7" long k&n now thanks."

Only the dyno will tell. If you don't have access to  a dyno I would use the largest K&N that will fit and get it 10" away from the slide. K&N are the industries standard for a reason.