Is this air filter still usable? (pix inside)

[1D4LV]

OTEP,

so hindi ok ang K&N filter? i'm thinking of replacing mine. what do you suggest? as said, there's a noticable increase in fuel economy..

hindi naman sa hindi ok.
PROS:

a. gives slight additional power
b. easier acceleration dahil maluwag ang intake
c. hindi kailangang palitan regularly. you just have to clean them.

CONS:

a. increase in fuel consumption
b. filtration is a little bit open compared to OEM paper filters.