GMC Sierra 2500 Performance Exhaust - Magnaflow - Direct-Fit Catalytic Converter - `03-`06
GMC Sierra 2500 Performance Exhaust - Magnaflow - Direct-Fit Catalytic Converter - `03-`06
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GMC Sierra 2500 Performance Exhaust - MagnaFlow Direct-Fit Catalytic Converter (2003–2006). This CARB-compliant replacement is designed to restore proper emissions function and maintain factory fitment for 2003–2006 GMC Sierra 2500 HD and compatible Chevrolet Silverado 2500 HD models.
Built to MagnaFlow’s California Grade specifications, this direct-fit catalytic converter features a spun-body design and mandrel-bent tubing to mirror OE flow characteristics. Constructed from corrosion-resistant stainless materials with a single laser fusion weld, it reduces potential leak points while keeping mass low for improved thermal behavior. The unit ships with gaskets and hardware to avoid reusing corroded factory parts and is intended for installation without cutting or welding when proper tools are used. This part is CARB-tested for legal use in California and other CARB-restricted states; installation is permitted only if the vehicle’s Executive Order (EO) number and Engine Family Number (EFN) appear in this converter’s CARB Executive Order.
Features
- California Grade CARB compliant for listed applications
- Direct-fit design—no cutting or welding required
- Mandrel-bent tubing and spun-body construction for OEM-like flow
- High-corrosion stainless materials and single laser fusion weld
- Included gaskets, hardware and Torca-style full‑coverage clamps
- OE-sized barbed hangers in corrosion-resistant stainless
If you have questions or want help confirming fitment, call us directly — 512-982-9393 (TX) or 562-981-6800 (CA). We have two installation and customization shops in Austin, Texas and the Los Angeles, California area and can install this unit on premises. If you are considering 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
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Call us at 512-982-9393 (Austin, TX) or
562-981-6800 (Signal Hill, CA)
and get assistance from one of our sales team members!
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