GMC Sierra 2500 HD Catalytic Converter - Driver Side - Magnaflow - HM Grade Direct-Fit - `01-`06
GMC Sierra 2500 HD Catalytic Converter - Driver Side - Magnaflow - HM Grade Direct-Fit - `01-`06
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GMC Sierra 2500 HD Catalytic Converter - Driver Side - Magnaflow - HM Grade Direct-Fit - `01-`06. This MagnaFlow HM Grade direct-fit catalytic converter is designed as a Federal/EPA-compliant replacement for the driver-side converter on 2001–2006 GMC Sierra 2500 HD trucks.
Engineered to match OEM fit and function, this converter uses precision manufacturing and a spun-body design to minimize leak points and maintain proper exhaust flow. Mandrel-bent tubing and highly corrosion-resistant stainless steel construction preserve flow dynamics and service life, while the compact, low-mass design improves thermal response. The unit comes with the necessary gaskets and hardware for a straightforward installation with common tools — no cutting or welding required — and is intended for OBDII federally registered vehicles meeting Federal emissions standards. Note: HM Grade parts are Federal/EPA compliant but are not CARB-approved and may not be legal for sale or installation in California, Colorado, or New York; confirm local regulations before purchasing or installing.
Features
- Direct-fit for 2001–2006 GMC Sierra 2500 HD (driver side)
- MagnaFlow HM Grade — Federal/EPA compliant for OBDII federal systems
- Mandrel-bent tubing with highly corrosion-resistant stainless steel (16 gauge 409)
- Spun-body design and precision welding to reduce leak potential
- Includes gaskets & hardware for installation; no cutting or welding needed
If you have questions or need help confirming fitment or emissions compliance, call us directly — we’re happy to assist. We have two install shops offering installation and customization services in Austin, Texas and the Los Angeles, California area: 512-982-9393 (TX) and 562-981-6800 (CA). Please verify local legality before installation if you are in a restricted state. If you are considering purchasing 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
Need Assistance?
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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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