I have seen alot of performance filters which state that they are universal, does anyone know how true this is, by that i mean does it realy matter what you bolt on to your car?they are all alot cheaper than the dedicated type, but then they dont have the name, ie pipercross or K&N and so on, so this might expain the lower costs, i have seen both the exposed type like K&N and the enclosed type all around £20.
