Catalytic Converter for Lincoln MKS MKZ (2013-2016) 3.7L Front Left & Right

Direct-Fit Front Manifold Catalytic Converter Set for 2013-2016 Lincoln MKS & MKZ (D3 / CD4)

What it Does: The front manifold catalytic converter set replaces failed or fouled factory converters on the 2013-2016 Lincoln MKS and MKZ to eliminate P0420/P0430 emissions fault codes and restore optimal exhaust gas flow.

The Stock Lincoln MKS & MKZ Catalyst Substrate Deterioration

Factory ceramic monolithic substrates on the transverse-mounted **3.7L Cyclone Ti-VCT V6** face severe thermal degradation due to tight packaging against the firewall on the **D3** and **CD4** platforms. Over time, high exhaust gas temperatures (EGTs) accelerate washcoat sintering, causing matrix crumbling and precious metal deactivation. This structural failure triggers recurring downstream oxygen sensor DTCs (**P0420/P0430**), increases exhaust backpressure, and restricts high-RPM volumetric efficiency.

The Engineering Solution

This matched Bank 1 and Bank 2 manifold catalytic converter assembly features high-flow ceramic honeycomb cores loaded with an efficient washcoat formulation for thorough hydrocarbon and NOx reduction. Manufactured with durable stainless steel tubing and heavy-duty, robotically TIG-welded flanges, these units resist thermal shock, flange warping, and exhaust leaks. Precision CNC-formed mounting flanges align with OE specifications **674256** and **674255**, providing direct bolt-on installation to the factory exhaust manifolds and downpipes without cutting or welding.

What's Included

• 1x Front Left (Bank 2) Catalytic Converter Assembly
• 1x Front Right (Bank 1) Catalytic Converter Assembly
• 1x Installation Hardware and Gasket Kit

Technical Specifications

Compatibility

• 2013-2016 Lincoln MKS 3.7L V6 (FWD / AWD)
• 2013-2016 Lincoln MKZ 3.7L V6 (FWD / AWD)

Frequently Asked Questions & Fitment Warnings

Does this fit the D3 and CD4 MKS,MKZ?

Yes, this is a direct fit for the 2013-2016 Lincoln MKS and MKZ equipped with the **3.7L Cyclone** engine. Non-CARB compliant: 46-state legal; not legal for sale or use in California, New York, Colorado, or Maine emissions applications, and does not fit 2.0L or 3.5L EcoBoost models.

Are mounting gaskets included in this package?

Yes, the package includes installation accessories and direct-fit flange gaskets required for complete installation.

The Lincoln Standard

Built to tight dimensional tolerances, this direct-fit catalytic pair restores proper backpressure and emissions compliance while maintaining the factory-quiet cabin refinement expected of a Lincoln platform.