Catalytic Converter for Hyundai Sonata (2002-2005) 2.7L Rear

Direct-Fit Rear Catalytic Converter for 2002-2005 Hyundai Sonata (EF)

What it Does: The direct-fit rear catalytic converter assembly replaces the deteriorated factory Y-pipe and substrate on 2002-2005 Sonata models to clear catalyst efficiency codes (P0420/P0430) and restore clean, unrestricted exhaust scavenging.

The Stock Hyundai Sonata Exhaust Restriction and Flex Failure

The aging factory exhaust on the EF generation Sonata suffers from fatigue at the integrated flex joints and catalyst degradation. Over continuous thermal cycles, the OEM internal washcoat deteriorates, causing reduced conversion efficiency, elevated backpressure, and persistent check engine lights. Furthermore, the factory dual-inlet Y-section on the 2.7L G6BA Delta V6 is prone to flex pipe blowout and flange warping, introducing unmetered pre-cat atmospheric leaks that skew downstream oxygen sensor feedback and degrade fuel trim stability.

The Engineering Solution

Engineered as a bolt-on assembly, this rear converter replaces the failure-prone stock piping without requiring cutting, sleeve adapters, or custom fabrication. Constructed with heavy-gauge stainless steel tubular routing, integrated interlock braided flex sections, and a high-efficiency ceramic substrate, this unit withstands excessive vibration and thermal shock. The high-flow washcoat formulation efficiently converts hydrocarbons, carbon monoxide, and NOx to keep the vehicle fully compliant with 46-state EPA emissions standards, matching OEM interchange references 50479 and 55488956.

Technical Specifications

Compatibility

• 2002 Hyundai Sonata (2.7L V6 Delta - Rear Position)
• 2003 Hyundai Sonata (2.7L V6 Delta - Rear Position)
• 2004 Hyundai Sonata (2.7L V6 Delta - Rear Position)
• 2005 Hyundai Sonata (2.7L V6 Delta - Rear Position)

Frequently Asked Questions

Does this fit the EF Sonata?

Yes, this is a direct fit for the 2002-2005 Hyundai Sonata equipped with the 2.7L V6 G6BA engine.

Is this catalytic converter legal for road use in California or New York?

No, this unit is 46-state Federal EPA compliant and cannot be sold, registered, or shipped to California, New York, Colorado, or Maine.

The Hyundai Commuter Standard

Built to handle high-mileage suburban duty cycles, this replacement converter restores smooth backpressure parameters and original exhaust note clarity across the entire rev range.