Description
Ford 7.3L Powerstroke Engine Air Filter CA9676 — Feed the Turbo
The CA9676 Engine Air Filter is the OEM-spec replacement for 1999-2003 Ford 7.3L Powerstroke Super Duty and 2000-2003 Excursion. The 7.3L's Garrett GTP38 turbocharger moves massive air volumes — a dirty filter directly impacts boost, EGTs, and towing performance.
Specifications
| Part Number |
CA9676 |
| OEM Cross-Reference |
2U2Z-9601-BA, 2U2J-9601-BA, PA5689, 49090 |
| Fitment |
1999-2003 F-250, F-350, F-450, F-550 7.3L; 2000-2003 Excursion 7.3L |
| Service Interval |
Every 30,000 miles (15,000 off-road/dusty) |
7.3L Intake: The 6637 Mod Alternative
Many 7.3L owners perform the popular "6637 mod" — replacing the factory air box with a large cylindrical filter (Napa 6637). While this increases airflow, it also increases intake noise and can ingest hot engine bay air. The OEM CA9676 filter in the factory air box provides excellent filtration with factory-cold-air intake routing. For stock-to-mild tuned trucks, stick with OEM-spec.
FAQ
Q: How do I know if my 7.3L air filter needs replacing?
A: Hold the filter up to a light source. If you can't see light through the media, it's clogged. Also check for debris in the pleats, oil contamination from the crankcase vent, or visible damage to the seal. Replace every 30,000 miles regardless of appearance.
Q: CA9676 vs 6637 mod — which is better?
A: The 6637 mod (Napa 6637 filter) provides more airflow but can ingest hot engine bay air. The OEM CA9676 filter in the factory air box routes cold air from the fender — better for towing and daily driving. For stock-to-mild tuned trucks, stick with the OEM-spec CA9676.
Q: Can a dirty air filter cause my 7.3L to smoke?
A: Yes — black smoke under acceleration is a classic symptom of restricted airflow. The engine runs rich because the turbo can't pull enough air through a clogged filter. Replace the filter and the smoke typically clears immediately.
