Originally Posted by pelked1
Noticed that the first link that shows how poor the K&N filtration has changed. Here is the new link.
ISO 5011 Duramax Air Filter Test Report
I will NEVER use a K&N. A lot more dirt into your motor for hp that you can't feel or a mileage increase that you can't detect.
i heard this years ago. less filtration = more airflow + more dirt. maybe if you just remove the filters altogether, you will see even more power.
i bought my last filters thru autozone. they were like $22.00s. bought 2 because we need 2 in our cars but when the came in the next day, there were 2 per box so i have some for my next change.