Chevrolet Silverado 2500 HD Catalytic Converter - MagnaFlow - Direct Fit - 2003-2006. A direct-fit catalytic converter engineered to replace the factory unit on 2003–2006 Chevrolet Silverado 2500 HD and compatible GMC Sierra 2500 HD applications, offering CARB-compliant emissions control where applicable.

This MagnaFlow converter is built to replicate OE fit and flow characteristics using 3D-scanned design data and a spun-body construction that minimizes leak points. The compact, low-mass design improves thermal efficiency while mandrel-bent tubing preserves OEM-like geometry for consistent exhaust flow and engine operation. Constructed from corrosion-resistant stainless steel with a single laser fusion weld, it installs without cutting or welding when used with the provided gaskets and hardware. It is produced to meet California Air Resources Board requirements for the listed vehicles; verify the converter’s CARB Executive Order (EO) and Engine Family Number (EFN) for eligibility in your application.

Features

• Direct-fit replacement for 2003–2006 Silverado 2500 HD / Sierra 2500 HD
• CARB-compliant for listed vehicles (verify EO/EFN)
• Mandrel-bent tubing to retain OEM flow geometry
• Spun-body design with single laser fusion weld to reduce leak potential
• Corrosion-resistant stainless steel construction and included gaskets/hardware

If you have questions about fitment, installation, or compatibility, call us directly — we're happy to help. We offer on-site installation and customization services at our two locations in Austin, Texas and the Los Angeles, California area. 512-982-9393 (TX) | 562-981-6800 (CA)

If you plan to purchase multiple items, contact us for shipping discounts. We install on premises at both locations.

CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov