Catalytic Converter for Ford Expedition (2015-2017) 3.5L Left & Right
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Direct-Fit Left & Right Catalytic Converter Set for 2015-2017 Ford Expedition (U324)
What it Does: The Direct-Fit Catalytic Converter Set replaces degraded or plugged OEM emissions units on the 2015-2017 Expedition to eliminate catalytic efficiency trouble codes and restore exhaust scavenging.
The Stock Ford Expedition Substrate Breakdown
The factory catalytic matrix on the U324 platform routinely suffers from internal washcoat attrition and structural breakdown under continuous exhaust thermal cycling. Paired with twin-turbocharged heat loading from the 3.5L EcoBoost, prolonged towing stresses the original honeycomb structure. Over time, high exhaust gas temperatures cause substrate sintering and localized melt-through, causing elevated exhaust backpressure, lost spool efficiency, and persistent P0420 and P0430 diagnostic trouble codes.
The Engineering Solution
This left and right converter assembly is engineered with mandrel-bent stainless steel tubing and robust, precision-cut flanges that match OEM exhaust geometry without requiring custom fabrication. High-flow ceramic internal substrates provide dense surface area for optimal emissions reduction, allowing the engine management system to maintain precise closed-loop fueling control. Integrated factory-positioned oxygen sensor bungs retain stock sensor harnesses, ensuring proper downstream monitoring and unrestrained turbocharger discharge flow.
Technical Specifications
| Fitment | 2015-2017 Ford Expedition |
|---|---|
| Engine / Chassis | 3.5L EcoBoost V6 / U324 |
| Stock Output | 365 hp / 420 lb-ft |
| Replaces OEM Part # | FL1Z-5E212-A, 19717, 19718, 59737, 59738, 645150, 645151 |
Compatibility
- 2015 Ford Expedition 3.5L EcoBoost V6 (XLT, Limited, King Ranch, Platinum)
- 2016 Ford Expedition 3.5L EcoBoost V6 (XLT, Limited, King Ranch, Platinum)
- 2017 Ford Expedition 3.5L EcoBoost V6 (XLT, Limited, King Ranch, Platinum)
Frequently Asked Questions
Does this fit the U324 Expedition?
Yes, this is a direct fit for the 2015-2017 Ford Expedition equipped with the 3.5L EcoBoost engine.
Will this resolve catalyst efficiency DTCs like P0420 and P0430?
Yes, this dual converter set restores necessary precious metal conversion volume to bring emissions readings back within factory OBD-II thresholds.
The Ford Towing Standard
Engineered to handle severe duty towing cycles and high exhaust gas temperatures, this direct-fit stainless assembly ensures durable exhaust management and dependable full-throttle boost retention under heavy loads.
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