Walker 83486 Catalytic Converter - Right

Walker CalCat Direct-Fit Catalytic Converter

Walker CalCat Part Number 83486 is a direct-fit catalytic converter built for CARB-compliant replacement on select Hummer H2 applications. It is engineered for a precise OE-style fit and is designed, tested, and validated to meet California Air Resources Board standards for covered vehicles.

For 2003-2006 Hummer H2 right-side applications, this Walker CalCat catalytic converter supports a direct replacement path with the correct flange configuration and emissions-system layout. The Walker CalCat line focuses on direct-fit coverage for OBDII and non-OBD vehicles, with application-specific fitment and CARB certification where required.

Key Features

• Walker CalCat direct-fit catalytic converter, Part Number 83486
• CARB certified for legal use in California and other CARB-requiring states on listed applications
• Specific-fit design for 2003-2006 Hummer H2, right side
• Round stainless steel body with ceramic substrate
• 3-bolt welded flange inlet and 2-bolt welded flange outlet
• Pre- and post-catalyst oxygen sensor locations
• OE-style dimensions for application-specific exhaust alignment

Detailed Description

Walker CalCat 83486 is a replacement catalytic converter for the right-side exhaust position on 2003, 2004, 2005, and 2006 Hummer H2 models. It uses a stainless steel body, ceramic substrate, and welded flange connections to match the factory-style exhaust layout. The converter is CARB Executive Order D-182-69 approved for the listed Hummer H2 applications, making it a direct-fit option for vehicles that must meet California emissions requirements.

This part cross-references MagnaFlow Exhaust Products 4451219 for the same application.

What It Helps Address

• Failed emissions testing on a covered Hummer H2 application
• Check engine light concerns related to catalyst efficiency codes
• Damaged or corroded factory catalytic converter housing
• Exhaust leaks at the converter flange connection
• Replacement needs for a CARB-compliant right-side converter

Installation Notes and Tips

• Fits 2006 Hummer H2, right; 2005 Hummer H2, right; 2004 Hummer H2, right; 2003 Hummer H2, right.
• Additional part 31610 is listed as needed to complete installation for the covered applications.
• Verify the inlet and outlet flange style before installation: 3-bolt welded flange inlet and 2-bolt welded flange outlet.
• Confirm oxygen sensor placement matches the vehicle’s pre- and post-catalyst sensor layout.
• Check local emissions regulations before installation, especially in CARB-regulated states.

Quality Assurance

Walker CalCat converters are designed, tested, and validated for CARB compliance on the listed applications. Part Number 83486 is built as a direct-fit replacement with application-specific dimensions and emissions-system compatibility for the covered Hummer H2 models.