d1h
Jan 02, 2015Nomad III
K&N
Who has replaced their stock air filter with a K&N? Are they really better? Improve performance, gas mileage, etc.
ib516 wrote:
I won't use them now. I did use one on my 2002 Cummins until I saw how much dust got through it.
Bigrick wrote:
If they improved mileage and performance, wouldn't the manufacturer use them?