Catalytic Converter for Ford Explorer (2006-2010) 4.0L Rear

Direct-Fit Rear Catalytic Converter for 2006-2010 Ford Explorer (U251)

What it Does: The rear catalytic converter assembly treats downstream exhaust gas on the 2006-2010 Explorer to eliminate P0420/P0430 diagnostic trouble codes and restore factory exhaust velocity.

The Stock Ford Explorer Washcoat Degradation and Flow Restriction

Over extended heat cycles and high mileage, the factory rear converter on the U251 platform experiences washcoat erosion and thermal breakdown within its monolithic core. This internal attrition causes substrate sintering or partial cell collapse, creating severe exhaust backpressure that chokes out the 4.0L Cologne V6 engine under towing loads. Furthermore, depleted precious metal loading fails to neutralize secondary unburned hydrocarbons and carbon monoxide, triggering persistent catalyst efficiency check engine lights and failing tailpipe emissions inspections.

The Engineering Solution

This rear catalytic converter assembly features a high-grade 409 stainless steel outer shell engineered to resist road salt pitting, road debris punctures, and extreme exhaust thermal cycling. Inside, a heavy-duty ceramic honeycomb substrate is coated with an optimized formulation of platinum, palladium, and rhodium washcoat to restore factory conversion efficiency without throttling scavenging speed. Built to original geometry, this direct-replacement unit retains factory flange positions and slip-fit joints, ensuring exact alignment with the OEM intermediate pipe and stock mounting hangers without custom torch work or tube expansion.

Technical Specifications

Compatibility

• 2006 Ford Explorer 4.0L V6 (Eddie Bauer, Limited, XLS, XLT)
• 2007 Ford Explorer 4.0L V6 (Eddie Bauer, Limited, XLT)
• 2008 Ford Explorer 4.0L V6 (Eddie Bauer, Limited, XLT)
• 2009 Ford Explorer 4.0L V6 (Eddie Bauer, Limited, XLT)
• 2010 Ford Explorer 4.0L V6 (Eddie Bauer, Limited, XLT)

Frequently Asked Questions

Does this fit the U251 Explorer?

Yes, this is a direct fit for the 2006-2010 Ford Explorer equipped with the 4.0L Cologne V6 engine.

Is this catalytic converter CARB-approved for California?

No, this assembly is EPA 48-state compliant and cannot be legally shipped to or installed on vehicles registered in California, New York, Colorado, or Maine.

The Ford Utility Durability Standard

Built to handle rigorous duty cycles and towing loads, this heavy-gauge stainless converter maintains uncompromised structural integrity and sustained exhaust throughput under demanding operating conditions.