Catalytic Converter for Chevrolet Impala (2014-2016) 2.5L Front

Direct-Fit Front Catalytic Converter for 2014-2016 Chevrolet Impala (Epsilon II)

What it Does: The front catalytic converter treats raw exhaust gases on the 2014-2016 Impala 2.5L to eliminate diagnostic trouble codes P0420 and P0430 while restoring correct exhaust backpressure.

The Stock Chevrolet Impala Catalytic Converter Failure

Over heat cycles and extended mileage, the factory washcoat degrades, triggering efficiency codes P0420 and P0430 on the GM Epsilon II chassis. Internal thermal fatigue, oil blow-by, or fuel trim imbalances fracture the original ceramic washcoat, causing substrate breakdown, internal rattling, and restricted exhaust flow that degrades fuel economy and throttle response on the 2.5L LCV Ecotec engine.

The Engineering Solution

This direct-replacement front converter features a mandrel-formed stainless steel body engineered for heat tolerance and corrosion resistance. Inside, a high-flow ceramic honeycomb substrate coated with precious metals oxidizes carbon monoxide and unburnt hydrocarbons while reducing nitrogen oxides. Designed to bolt straight into the factory location, it features precision-welded 3-bolt inlet and 2-bolt outlet flanges, OEM hanger locations, and factory-positioned O2 sensor bungs to ensure leak-free sealing and precise air-fuel monitoring.

What's Included

• 1 Catalytic Converter
• Flange Gaskets
• Installation Bolts

Technical Specifications

Compatibility

• 2014 Chevrolet Impala 2.5L (Non-PZEV Models)
• 2015 Chevrolet Impala 2.5L (Non-PZEV Models)
• 2016 Chevrolet Impala 2.5L (Non-PZEV Models)

Frequently Asked Questions & Fitment Warnings

Does this fit the Epsilon II Impala?

Yes, this is a direct fit for the 2014-2016 Chevrolet Impala equipped with the 2.5L LCV engine. Does not fit Partial Zero Emissions Vehicle (PZEV) models or vehicles registered in California, Colorado, New York, or Maine.

Do I need to fix active engine misfires before installation?

Yes, any active misfires, coolant leaks, or unmetered oil burning must be resolved prior to installation to prevent unburnt fuel from overheating and melting the new ceramic substrate.

The Chevrolet Reliability Standard

Built to factory geometry, this converter maintains compliant federal emissions operation and OEM exhaust velocity without altering factory engine calibration or drone characteristics.