Hi i would like to install custom air filter in my cbz xtreme, i have confused between k&n filters, more than performance i am looking forward to increase the sound of the vehicle...i have seen in some vehicles installed with k&n filters have that masmerising sound only when it is raved to high rpm, i want the sound of filter in idle engine runtime too....so anyone pls help me with this...if i am installing k&n filter which one will be better, R1060, RC1060, RC1100 or R1100....or if there is any other filters which give better sound, let me knw