Air filter recomendations??

[JoshKB]

im currently running hks but its rubs on the bonnet and has taken away the paint and destroyed the sound proofing/heat sheild does anyone know what other air filter that would be better? my freind has a k&n and it seems to have a much smaller diamiter than the hks mushroom filter.

Im currently using sainsburys finest scouring pads to stop the bonnet being rubbed anymore but the impreza is eating through them quickly :')

Thanks