The K&N 57-2546-1 is a performance air intake kit for the 2003–2007 Ford F-Series and Excursion equipped with the 6.0L V8 diesel. It pairs a custom rotationally-molded tube with a large filter, and K&N guarantees a horsepower increase. The tube is made from high-density polyethylene, which helps it carry more air to the engine than the factory airbox and tube setup.
The purchase case rests on the filter and the airflow. The kit uses a washable, reusable High-Flow filter with oiled cotton media, so you clean and re-oil it instead of buying disposable replacements. The manufacturer also states that the kit provides a guaranteed increase in horsepower and torque. Published gain figures vary between sources, so confirm the numbers with the manufacturer before you buy. Search terms buyers commonly use include 6.0 Powerstroke cold air intake, 03-07 F250 F350 intake upgrade, and K&N 57-2546-1 6.0L install.
The manufacturer lists the kit for the 2003–2007 Ford F-Series and Excursion with the V8-6.0L engine. Confirm your exact model and year against the manufacturer's listing before ordering.
The manufacturer describes the High-Flow filter as washable and reusable, so it is cleaned rather than replaced. The manufacturer's recommended cleaning interval and oil type were not confirmed in this research, so check them with the manufacturer.
The manufacturer guarantees a gain in horsepower and torque but does not present a single confirmed figure in the material reviewed. Published estimates differ, so ask the manufacturer for its dyno data.
