The K&N E-1946 is a reusable, round high-performance replacement air filter for the 7.3L V8 diesel in Ford pickups. K&N's washable, reusable High-Flow Air Filters use layered, oiled cotton media designed to improve airflow and capture contaminants. It is engineered to last the entire lifespan of the vehicle. Choose it over a disposable paper filter if you want to stop rebuying elements every service interval on a Power Stroke truck.
The payback case is the reuse. The manufacturer estimates a K&N washable filter can save up to $125 compared with buying multiple disposable OE-style filters over 200,000 miles of highway driving. The manufacturer also backs the filter with a K&N Million Mile Limited Warranty. Searches like "7.3 Power Stroke washable air filter," "E-1946 reusable diesel air filter," and "Ford F-250 7.3 diesel high flow intake filter" lead to this part. Because the media is oiled, cleaning means washing and re-oiling rather than tapping it out.
The manufacturer lists the 7.3L V8 diesel in Ford P/U models for 1995-1997. Owners on user forums and some sellers' fitment data also cite 1994 and 1998 applications for this engine, so details vary. Confirm the fit with the manufacturer before ordering, using your truck's model year and engine.
The manufacturer says the filter is washable and reusable and is engineered to last for the life of the vehicle. It is covered by a 10-year/million-mile limited warranty. Clean and re-oil it at service intervals instead of replacing it.
