Catalytic Converter for Ford F-150 (2005-2008) 4.2L Right

Direct-Fit Right Catalytic Converter for 2005-2008 Ford F-150 (P221)

What it Does: The right-side catalytic converter replaces degraded factory emissions equipment on the 2005-2008 F-150 to restore factory exhaust scavenging and eliminate catalyst inefficiency diagnostic trouble codes like P0420 and P0430.

The Stock Ford F-150 Catalyst Degradation and Thermal Fatigue

Over extended operating cycles, factory catalytic converters on the P221 chassis experience washcoat erosion and structural substrate fracture. The Essex 4.2L V6 generates sustained exhaust thermal cycling during heavy hauling, which degrades the original ceramic monolith over time. This leads to carbon fouling, melted cell matrices, increased exhaust backpressure, choked high-RPM cylinder evacuation, and downstream oxygen sensor catalyst efficiency check engine lights.

The Engineering Solution

Engineered as a bolt-on assembly, this passenger-side unit features heavy-gauge stainless steel construction resistant to thermal expansion cracking and road-salt corrosion. Inside, a high-flow ceramic substrate is washcoated with active precious metals to properly reduce hydrocarbon, NOx, and CO emissions while preserving exhaust flow velocity. Precision-machined, OE-spec flanges and integrated downstream O2 sensor bungs allow direct installation without custom pipe bending or welding, matching factory hanger positions and interchange 16787.

Technical Specifications

Compatibility

• 2005 Ford F-150 (4.2L V6, Right / Passenger Side)
• 2006 Ford F-150 (4.2L V6, Right / Passenger Side)
• 2007 Ford F-150 (4.2L V6, Right / Passenger Side)
• 2008 Ford F-150 (4.2L V6, Right / Passenger Side)

Frequently Asked Questions

Does this fit the P221 F-150?

Yes, this is a direct fit for the 2005-2008 Ford F-150 equipped with the 4.2L Essex V6 engine.

Is this unit legal for sale in CARB-compliant states?

This is a 46-state Federal EPA compliant assembly and is not legal for sale, purchase, or installation in California, Colorado, New York, or Maine.

The Ford Truck Caliber

Work-ready trucks demand heavy-duty exhaust components that endure heavy towing weights and rigorous payloads without cracking flanges or failing emissions standards.