d1h wrote:
Who has replaced their stock air filter with a K&N? Are they really better? Improve performance, gas mileage, etc.
I doubt in many of those responding speak from actual experience with the product.
Improve performance ?
Improve gas mileage ??
I've used a K&N OEM drop in replacement filters over the years with no issues on gas and diesel engines. The last gas powered truck with a K&N drop in OEM type ran for over 230k miles with no issues (same cleanable/reusable filter).
Never noticed any mpg gain but the truck did have a bit more more seat of the pants improvement while towing which helped the engine run a little easier while towing.
I use a older AFE pro 7 filter on the on my '03 Cummins since it was new. No issues in 255k miles.
Never noticed a fuel mileage gain but it did drop the Cummins EGT around 100 degrees while towing. I would see 1300 degrees temps on the Westach before and 1200 degree max after installing the Pro 7.
Will the K&E do anything for your tow vehicle ?? Can't say as its gonna' depend on the tow vehicle.