Catalytic Converter for Ford E-350 E-450 (2017-2018) 6.8L

Direct-Fit EPA-Compliant Catalytic Converter for 2017-2018 Ford E-Series (VN127)

What it Does: The direct-fit catalytic converter replaces clogged or degraded emissions hardware on the 2017-2018 Ford E-Series to eliminate P0420/P0430 DTC codes, restore exhaust scavenging, and maintain legal tailpipe emissions.

The Stock Ford E-Series Converter Degradation

Commercial cutaway fleet duty cycles subject the VN127 chassis to continuous thermal loading, heavy payload dragging, and high operating exhaust gas temperatures (EGTs). Over extended mileage, the factory catalytic converter substrate on the 6.8L Triton V10 suffers from washcoat sintering, internal carbon poisoning, and thermal shock fractures. This deterioration restricts exhaust gas velocity, elevates manifold backpressure, triggers catalyst inefficiency trouble codes, and degrades operational torque delivery under load.

The Engineering Solution

Engineered as a bolt-on replacement, this unit features a heavy-gauge 409 stainless steel shell engineered to withstand thermal cycling and underbody corrosion. The internal assembly houses a high-flow ceramic honeycomb monolith coated with a concentrated precious-metal washcoat (Platinum, Palladium, Rhodium) designed for rapid light-off and optimal hydrocarbon/CO/NOx conversion efficiency. Precision laser-cut flanges and factory-located, precision-threaded O2 sensor bungs allow direct interface with OEM exhaust manifolds without cutting or welding, fully interchanging with OEM part numbers 646321 and 30809.

What's Included

• 1 × Direct-Fit Catalytic Converter Assembly
• 1 × Installation Hardware Accessory Kit

Technical Specifications

Compatibility

• 2017 Ford E-350 Cutaway / Stripped Chassis (6.8L V10)
• 2018 Ford E-350 Cutaway / Stripped Chassis (6.8L V10)
• 2017 Ford E-450 Cutaway / Stripped Chassis (6.8L V10)
• 2018 Ford E-450 Cutaway / Stripped Chassis (6.8L V10)

Frequently Asked Questions & Fitment Warnings

Does this fit the VN127 E-Series?

Yes, this is a direct fit for the 2017-2018 Ford E-Series equipped with the 6.8L Triton V10 engine. Non-CARB compliant: Not legal for sale or use in California, New York, Colorado, or Maine.

Are aftermarket ECU modifications or tuning required following installation?

No tuning is required; the ceramic substrate and washcoat loading operate within factory OBD-II downstream sensor thresholds to clear DTC check engine lights naturally.

The Ford Commercial Durability Standard

Manufactured to endure demanding commercial shuttle and towing duty cycles, this converter delivers the exhaust flow and thermal stamina demanded by fleet operators.