K&N
Who has replaced their stock air filter with a K&N? Are they really better? Improve performance, gas mileage, etc.
Forum Discussion
To each his own but after going to the Cummins forum I decided to take mine out and stay with the stock filter...didn't want to screw up MAS sensor and didn't see any difference in mileage or performance either one. Maybe if I had an all out racing motor then maybe I could have seen a difference. Most people on the Cummins forum say to stay away from them but again to each his own. I have one just barely used if you want to purchase it...cheap.
