nagpapalit ng aftermarket filter because they want to attain more power bradier. the more fuel you give the more power/acceleration you will gain. If you increase fuel, you need to increse air. dapat maintain mo ratio. the colder the air, the bigger in volume,(combine gas law).
aftermarket filters look good. but pors have higher microns compared to stock filters. thus, it doesnt filter much dirt as dirt as the stock filters. if you use after market filters, mas marami dust , dirt foreign particles na pwedeng makapasok.
So ikaw nalng mag timbang bradier, which is your priority. looks, power, fuel consumption, life span ng engine
yan lang po