Originally Posted by kstanf150
Originally Posted by joegreen
What's wrong with the stock filter?
Nothing wrong with the factory filter as far as I know
But for the same cost as a factory replacement I'd like to think that there's a high quality aftermarket filter with the same filtration as the factory with higher flow numbers.
If you look at that air filter test comparison linked earlier you'll see that with air filters the more free flowing filter will typically let more dirt through.
And as pointed out, the most restrictive to least restrictive OEM sized air filter isn't going to give you more than just a few more peak HP at full throttle. So is that worth it for allowing more dirt through and potentially resulting in more engine wear. How many times do you got full throttle per day?
Changing the airbox/inlet tube system and using a filter with more surface area will increase air flow more than just changing the air filter in the stock intake system.