injen cai air filter replacement

[mmmsxc]

hi guys. im looking at replacing my air filter on the my injen cai. i was looking at k&n filters, and i was wondering if there were any brands that you guys recommend on the forum. also what size do i need? from memory it is a 4 inch. if im wrong please correct me. thanks.

[bentusi123]

my friend changed injen air filter to K&N air filter.
but the function is not good as injen one.

[NSPYRE]

why change for? injen air filter is completely servicable...

[badthing]

I'm using K&N filter on my Injen CAI and it works fine. No noticeable difference.

[mmmsxc]

thats good to know. how about the size?

[Crapdaz]

depending on your piping size, standard would be 3" but you might have 2.5" just measure it.