# MagnaFlow 21-252 Direct Fit OEM Grade Catalytic Converter for 2011-2019 Chevrolet Silverado 2500 Hd and More ### Performance Overview The Magnaflow OEM Grade Catalytic Converters are the perfect replacement for your stock converter. They are crafted from high-quality stainless or aluminized steel for maximum durability. They are seam-welded for unbreakable bonds with no risk of vibrations. The catalytic converters are available with a lap inserted in the point where the neck meets the catalytic converter body. The neck is carefully formed to be sure that it doesn't reach the body where it can cause trouble to the exhaust flow. As an additional safety feature, the Catalytic Converter has a heavy duty heat shield to protect it against extreme heat and give additional stability. ### Key Features - Brand: MagnaFlow - Part number: 21-252 - Product type: Direct Fit OEM Grade Catalytic Converter - Designed for compatible vehicle applications listed on this page ### Vehicle Fitment - 2011 Chevrolet Silverado 2500 Hd, Note: Lt, Ltz, Wt; 6.0L - 2012 Chevrolet Silverado 2500 Hd, Note: Lt, Ltz, Wt; 6.0L - 2013 Chevrolet Silverado 2500 Hd, Note: Lt, Ltz, Wt; 6.0L - 2014 Chevrolet Silverado 2500 Hd, Note: Lt, Ltz, Wt; 6.0L - 2015 Chevrolet Silverado 2500 Hd, Note: High Country, Lt, Ltz, Wt; 6.0L - 2016 Chevrolet Silverado 2500 Hd, Note: High Country, Lt, Ltz, Wt; 6.0L - 2017 Chevrolet Silverado 2500 Hd, Note: High Country, Lt, Ltz, Wt; 6.0L - 2018 Chevrolet Silverado 2500 Hd, Note: High Country, Lt, Ltz, Wt; 6.0L ### FAQ **Will this fit my vehicle?** Please verify your year, make, model, position, and any fitment notes using the compatibility list above before purchase. **What part number is this?** The listed part number is 21-252. **Is this product designed for direct replacement?** Yes. This product is intended to match compatible vehicle applications listed in the fitment section. **Should I confirm fitment before ordering?** Yes. Always compare your original part, position, and vehicle details with the fitment chart before ordering. ### Common Searches - Direct Fit OEM Grade Catalytic Converter for Chevrolet Silverado 2500 Hd - 21-252 fitment - MagnaFlow Direct Fit OEM Grade Catalytic Converter - 2011 Chevrolet Silverado 2500 Hd Direct Fit OEM Grade Catalytic Converter ### Vehicle Fitment Table Year Make Model Position Fitment Precision Note 2011 Chevrolet Silverado 2500 Hd Lt, Ltz, Wt; 6.0L 2012 Chevrolet Silverado 2500 Hd Lt, Ltz, Wt; 6.0L 2013 Chevrolet Silverado 2500 Hd Lt, Ltz, Wt; 6.0L 2014 Chevrolet Silverado 2500 Hd Lt, Ltz, Wt; 6.0L 2015 Chevrolet Silverado 2500 Hd High Country, Lt, Ltz, Wt; 6.0L 2016 Chevrolet Silverado 2500 Hd High Country, Lt, Ltz, Wt; 6.0L 2017 Chevrolet Silverado 2500 Hd High Country, Lt, Ltz, Wt; 6.0L 2018 Chevrolet Silverado 2500 Hd High Country, Lt, Ltz, Wt; 6.0L 2019 Chevrolet Silverado 2500 Hd High Country, Lt, Ltz, Wt; 6.0L 2011 Chevrolet Silverado 3500 Hd Lt, Ltz, Wt; 6.0L 2012 Chevrolet Silverado 3500 Hd Lt, Ltz, Wt; 6.0L 2013 Chevrolet Silverado 3500 Hd Lt, Ltz, Wt; 6.0L 2014 Chevrolet Silverado 3500 Hd Lt, Ltz, Wt; 6.0L 2015 Chevrolet Silverado 3500 Hd High Country, Lt, Ltz, Wt; 6.0L 2016 Chevrolet Silverado 3500 Hd High Country, Lt, Ltz, Wt; 6.0L 2017 Chevrolet Silverado 3500 Hd High Country, Lt, Ltz, Wt; 6.0L 2018 Chevrolet Silverado 3500 Hd High Country, Lt, Ltz, Wt; 6.0L 2019 Chevrolet Silverado 3500 Hd High Country, Lt, Ltz, Wt; 6.0L 2011 GMC Sierra 2500 Hd Denali, Sle, Slt, Wt; 6.0L 2012 GMC Sierra 2500 Hd Denali, Sle, Slt, Wt; 6.0L 2013 GMC Sierra 2500 Hd Denali, Sle, Slt, Wt; 6.0L 2014 GMC Sierra 2500 Hd Denali, Sle, Slt, Wt; 6.0L 2015 GMC Sierra 2500 Hd Base, Denali, Sle, Slt; 6.0L 2016 GMC Sierra 2500 Hd Base, Denali, Sle, Slt; 6.0L 2017 GMC Sierra 2500 Hd Base, Denali, Sle, Slt; 6.0L 2018 GMC Sierra 2500 Hd Base, Denali, Sle, Slt; 6.0L 2019 GMC Sierra 2500 Hd Base, Denali, Sle, Slt; 6.0L 2011 GMC Sierra 3500 Hd Denali, Sle, Slt, Wt; 6.0L 2012 GMC Sierra 3500 Hd Denali, Sle, Slt, Wt; 6.0L 2013 GMC Sierra 3500 Hd Denali, Sle, Slt, Wt; 6.0L 2014 GMC Sierra 3500 Hd Denali, Sle, Slt, Wt; 6.0L 2015 GMC Sierra 3500 Hd Base, Denali, Sle, Slt; 6.0L 2016 GMC Sierra 3500 Hd Base, Denali, Sle, Slt; 6.0L 2017 GMC Sierra 3500 Hd Base, Denali, Sle, Slt; 6.0L 2018 GMC Sierra 3500 Hd Base, Denali, Sle, Slt; 6.0L 2019 GMC Sierra 3500 Hd Base, Denali, Sle, Slt; 6.0L ## Details - **Price:** 1464.5 CAD - **Vendor:** MagnaFlow - **Type:** Direct Fit OEM Grade Catalytic Converter - **Tags:** 2011 Chevrolet Silverado 2500 Hd, 2011 Chevrolet Silverado 3500 Hd, 2011 GMC Sierra 2500 Hd, 2011 GMC Sierra 3500 Hd, 2012 Chevrolet Silverado 2500 Hd, 2012 Chevrolet Silverado 3500 Hd, 2012 GMC Sierra 2500 Hd, 2012 GMC Sierra 3500 Hd, 2013 Chevrolet Silverado 2500 Hd, 2013 Chevrolet Silverado 3500 Hd, 2013 GMC Sierra 2500 Hd, 2013 GMC Sierra 3500 Hd, 2014 Chevrolet Silverado 2500 Hd, 2014 Chevrolet Silverado 3500 Hd, 2014 GMC Sierra 2500 Hd, 2014 GMC Sierra 3500 Hd, 2015 Chevrolet Silverado 2500 Hd, 2015 Chevrolet Silverado 3500 Hd, 2015 GMC Sierra 2500 Hd, 2015 GMC Sierra 3500 Hd, 2016 Chevrolet Silverado 2500 Hd, 2016 Chevrolet Silverado 3500 Hd, 2016 GMC Sierra 2500 Hd, 2016 GMC Sierra 3500 Hd, 2017 Chevrolet Silverado 2500 Hd, 2017 Chevrolet Silverado 3500 Hd, 2017 GMC Sierra 2500 Hd, 2017 GMC Sierra 3500 Hd, 2018 Chevrolet Silverado 2500 Hd, 2018 Chevrolet Silverado 3500 Hd, 2018 GMC Sierra 2500 Hd, 2018 GMC Sierra 3500 Hd, 2019 Chevrolet Silverado 2500 Hd, 2019 Chevrolet Silverado 3500 Hd, 2019 GMC Sierra 2500 Hd, 21-252, Auto Parts, Automotive, Catalytic Converter, Direct Fit OEM Grade Catalytic Converter, Direct Replacement, Exhaust Performance, Exhaust System, MagnaFlow, Magnaflow-21-252, Muffler, Performance Exhaust, Performance Parts, Vehicle Fitment ## Variants | Variant | Price | Available | |---------|-------|-----------| | Default Title | 1464.50 CAD | In stock | ## Images - MagnaFlow 21-252 Direct Fit OEM Grade Catalytic Converter --- > Source: [Standard Auto Part](https://www.standardautopart.com/products/magnaflow-chevrolet-silverado-2500-hd-catalytic-converter-21-252) > Updated: 2026-07-16