FA1927 HC3Z9601A Air Filter Fits Ford F-250 F-350 F-450 F-550 Super Duty with 6.7L Powerstroke engine

Often found in later 6.7L Powerstroke models (2017+), which switched to a more complex dual-filter system, potentially acting as the secondary filter or an upgraded primary.

Identify Primary vs. Secondary: For 2017+ models, you have two filters; confirm if you need the primary (large) or secondary (small) filter (e.g., FA1927 is often the smaller, more efficient secondary filter).