i agree...my brother ride rvf n he just bought knn filter at car shop...$90++ n guess wat,he can do atleast 3 for his bike n 2 for my x1...is'nt it good...come on lah t135,all of us ride bikes,we share bt nt cheat....btw u can get the filter @ jurong point...it cums wif a box...i tink if sum of u guys share sum cash up,u can grab it...n can ask my bro to fix it for u...bt of cos sum labour chargers lah...i ever ask from bike shops, so x lah...82087060...one...kol me for more details...