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OEM Grade Direct-Fit Catalytic Converter-Chevrolet/GMC

Magnaflow Part number: 21-252 In stock
Ready for checkout Secure this part for your build
$1,010.00
Secure checkout Availability and delivery details shown below Ask for fitment help
Availability: In stock
Part number: 21-252
Manufacturer: Magnaflow
MagnaFlow Conv Direct Fit 11-16 Chevrolet Silverado 2500HD/3500HD / GMC Sierra 2500HD/3500HD
In stock — usually ships within 1 business day

Keep the check engine light off with MagnaFlow OEM Grade Federal/EPA Compliant Direct-Fit Catalytic Converter 21-252. With features including free-flowing mandrel-bent tubing and highly corrosion resistant stainless steel construction, easily install this spun body converter yourself using the proper tools, no cutting or welding required. MagnaFlow's state-of-the-art metrology department uses the latest 3D scanning systems during research and development, so you can be confident that your new part will fit and function like the original equipment. By replicating the OE spun body design, the single laser fusion weld greatly reduces the possibility of a leak, and our compact, low-mass design also allows for greater thermal efficiency. This direct-fit catalytic converter is designed to fit the 2011-2019 Chevrolet Silverado 2500 HD, 2011-2019 GMC Sierra 2500 HD, and additional vehicles. This replacement part is designed to meet or exceed Federal emissions requirements set forth by the EPA, complying with legal standards for OBDII Federally registered vehicles with California or Federal/EPA Emission systems.

MagnaFlow OEM Grade Federal/EPA Compliant Direct-Fit Catalytic Converter 21-252 helps keep the check engine light off. DIY installation is easy with the proper tools (no cutting or welding required). With features including mandrel-bent tubing to eliminate flow restrictions and stainless steel construction to resist corrosion, you can have confidence in the quality of this catalytic converter. Using state-of-the-art 3D scanning systems in the design process, the MagnaFlow metrology department ensures this new part to fit and function like the original equipment. This direct-fit catalytic converter is designed to fit the 2011-2019 Chevrolet Silverado 2500 HD, 2011-2019 GMC Sierra 2500 HD, and additional vehicles. Hardware is included to eliminate the hassle of working with corroded factory parts. This replacement part is designed to meet or exceed Federal emissions requirements set forth by the EPA, complying with legal standards for OBDII Federally registered vehicles with California or Federal/EPA Emission systems.

Keep the check engine light off with MagnaFlow OEM Grade Federal/EPA Compliant Direct-Fit Catalytic Converter 21-252. With features including free-flowing mandrel-bent tubing and highly corrosion resistant stainless steel construction, easily install this converter yourself using the proper tools, no cutting or welding required. MagnaFlow's state-of-the-art metrology department uses the latest 3D scanning systems during research and development, so you can be confident that your new part will fit and function like the original equipment. By replicating the OE design, the single laser fusion weld greatly reduces the possibility of a leak, and our compact, low-mass design also allows for greater thermal efficiency. MagnaFlow 21-252 includes (2) Torca Clamps. This replacement part is designed to meet or exceed Federal emissions requirements set forth by the EPA, complying with legal standards for OBDII Federally registered vehicles with California or Federal/EPA Emission systems.

Your trusted source for EPA-compliant catalytic converters, providing assurance of genuine compliance while delivering quality that will last

Mandrel bent tubing retains OEM-like design and geometry, ensuring smooth exhaust flow for peak fuel economy and engine operation

OE-sized barbed exhaust hangers made from corrosion-resistant 410 stainless steel, designed to reduce noise and vibration

High Strength 16 Gauge 409 Stainless Steel Tubing For Exceptional Corrosion Resistance And Maximum Service Life

Expertly crafted to replicate OEM-like flow dynamics, maintaining factory performance and fuel efficiency

Expertly Crafted To Replicate Oem-Like Flow Dynamics/Maintaining Factory Performance And Fuel Efficiency

Precision Stamped Collector Design For Optimal Exhaust Flow/Engine Efficiency And Fuel Economy

MagnaFlow Conv Direct Fit 11-16 Chevrolet Silverado 2500HD/3500HD / GMC Sierra 2500HD/3500HD

Torca Accuseal Exhaust Clamps Provide A Full 360-Degree Equally Distributed Clamping Force

Simplifies Installation With Essential Gaskets And Hardware Being Included In The Box

OE-Sized Barbed Exhaust Hangers Made From Corrosion-Resistant 410 Stainless Steel

Exhaust,MagnaFlow,Catalytic Convertor,Cadillac Convertor,Convertor,Emissions

Not legal for sale or installation in California, Colorado or New York.

Not legal for sale or installation in California; Colorado or New York.

Your Trusted Source For EPA-Compliant Catalytic Converters

Mandrel Bent Tubing Retains Oem-Like Design And Geometry

OEM Grade Direct-Fit Catalytic Converter-Chevrolet/GMC

Magnaflow OEM Grade Direct-Fit Catalytic Converter

OEM Grade Direct-Fit Catalytic Converter 21-252

OEM Grade Direct-Fit Catalytic Converter

Durable 308 stainless steel MIG welds

Catalytic Converter

CatConverter

OEM Grade

25173701

OEM

142 vehicle listings Source data lists this part for the vehicles shown below. Confirm engine, drivetrain, position, and other options before ordering.
2011 14 listings
Chevrolet Silverado 2500 HD LT
Chevrolet Silverado 2500 HD LTZ
Chevrolet Silverado 2500 HD WT
Chevrolet Silverado 3500 HD LT
Chevrolet Silverado 3500 HD LTZ
Chevrolet Silverado 3500 HD WT
GMC Sierra 2500 HD Denali
GMC Sierra 2500 HD SLE
GMC Sierra 2500 HD SLT
GMC Sierra 2500 HD WT
GMC Sierra 3500 HD Denali
GMC Sierra 3500 HD SLE
GMC Sierra 3500 HD SLT
GMC Sierra 3500 HD WT
2012 14 listings
Chevrolet Silverado 2500 HD LT
Chevrolet Silverado 2500 HD LTZ
Chevrolet Silverado 2500 HD WT
Chevrolet Silverado 3500 HD LT
Chevrolet Silverado 3500 HD LTZ
Chevrolet Silverado 3500 HD WT
GMC Sierra 2500 HD Denali
GMC Sierra 2500 HD SLE
GMC Sierra 2500 HD SLT
GMC Sierra 2500 HD WT
GMC Sierra 3500 HD Denali
GMC Sierra 3500 HD SLE
GMC Sierra 3500 HD SLT
GMC Sierra 3500 HD WT
2013 14 listings
Chevrolet Silverado 2500 HD LT
Chevrolet Silverado 2500 HD LTZ
Chevrolet Silverado 2500 HD WT
Chevrolet Silverado 3500 HD LT
Chevrolet Silverado 3500 HD LTZ
Chevrolet Silverado 3500 HD WT
GMC Sierra 2500 HD Denali
GMC Sierra 2500 HD SLE
GMC Sierra 2500 HD SLT
GMC Sierra 2500 HD WT
GMC Sierra 3500 HD Denali
GMC Sierra 3500 HD SLE
GMC Sierra 3500 HD SLT
GMC Sierra 3500 HD WT
2014 14 listings
Chevrolet Silverado 2500 HD LT
Chevrolet Silverado 2500 HD LTZ
Chevrolet Silverado 2500 HD WT
Chevrolet Silverado 3500 HD LT
Chevrolet Silverado 3500 HD LTZ
Chevrolet Silverado 3500 HD WT
GMC Sierra 2500 HD Denali
GMC Sierra 2500 HD SLE
GMC Sierra 2500 HD SLT
GMC Sierra 2500 HD WT
GMC Sierra 3500 HD Denali
GMC Sierra 3500 HD SLE
GMC Sierra 3500 HD SLT
GMC Sierra 3500 HD WT
2015 16 listings
Chevrolet Silverado 2500 HD High Country
Chevrolet Silverado 2500 HD LT
Chevrolet Silverado 2500 HD LTZ
Chevrolet Silverado 2500 HD WT
Chevrolet Silverado 3500 HD High Country
Chevrolet Silverado 3500 HD LT
Chevrolet Silverado 3500 HD LTZ
Chevrolet Silverado 3500 HD WT
GMC Sierra 2500 HD Base
GMC Sierra 2500 HD Denali
GMC Sierra 2500 HD SLE
GMC Sierra 2500 HD SLT
GMC Sierra 3500 HD Base
GMC Sierra 3500 HD Denali
GMC Sierra 3500 HD SLE
GMC Sierra 3500 HD SLT
2016 16 listings
Chevrolet Silverado 2500 HD High Country
Chevrolet Silverado 2500 HD LT
Chevrolet Silverado 2500 HD LTZ
Chevrolet Silverado 2500 HD WT
Chevrolet Silverado 3500 HD High Country
Chevrolet Silverado 3500 HD LT
Chevrolet Silverado 3500 HD LTZ
Chevrolet Silverado 3500 HD WT
GMC Sierra 2500 HD Base
GMC Sierra 2500 HD Denali
GMC Sierra 2500 HD SLE
GMC Sierra 2500 HD SLT
GMC Sierra 3500 HD Base
GMC Sierra 3500 HD Denali
GMC Sierra 3500 HD SLE
GMC Sierra 3500 HD SLT
2017 18 listings
Chevrolet Silverado 2500 HD High Country
Chevrolet Silverado 2500 HD LT
Chevrolet Silverado 2500 HD LTZ
Chevrolet Silverado 2500 HD WT
Chevrolet Silverado 3500 HD High Country
Chevrolet Silverado 3500 HD LT
Chevrolet Silverado 3500 HD LTZ
Chevrolet Silverado 3500 HD WT
Chevrolet Suburban 3500 HD LS
Chevrolet Suburban 3500 HD LT
GMC Sierra 2500 HD Base
GMC Sierra 2500 HD Denali
GMC Sierra 2500 HD SLE
GMC Sierra 2500 HD SLT
GMC Sierra 3500 HD Base
GMC Sierra 3500 HD Denali
GMC Sierra 3500 HD SLE
GMC Sierra 3500 HD SLT
2018 18 listings
Chevrolet Silverado 2500 HD High Country
Chevrolet Silverado 2500 HD LT
Chevrolet Silverado 2500 HD LTZ
Chevrolet Silverado 2500 HD WT
Chevrolet Silverado 3500 HD High Country
Chevrolet Silverado 3500 HD LT
Chevrolet Silverado 3500 HD LTZ
Chevrolet Silverado 3500 HD WT
Chevrolet Suburban 3500 HD LS
Chevrolet Suburban 3500 HD LT
GMC Sierra 2500 HD Base
GMC Sierra 2500 HD Denali
GMC Sierra 2500 HD SLE
GMC Sierra 2500 HD SLT
GMC Sierra 3500 HD Base
GMC Sierra 3500 HD Denali
GMC Sierra 3500 HD SLE
GMC Sierra 3500 HD SLT
2019 18 listings
Chevrolet Silverado 2500 HD High Country
Chevrolet Silverado 2500 HD LT
Chevrolet Silverado 2500 HD LTZ
Chevrolet Silverado 2500 HD WT
Chevrolet Silverado 3500 HD High Country
Chevrolet Silverado 3500 HD LT
Chevrolet Silverado 3500 HD LTZ
Chevrolet Silverado 3500 HD WT
Chevrolet Suburban 3500 HD LS
Chevrolet Suburban 3500 HD LT
GMC Sierra 2500 HD Base
GMC Sierra 2500 HD Denali
GMC Sierra 2500 HD SLE
GMC Sierra 2500 HD SLT
GMC Sierra 3500 HD Base
GMC Sierra 3500 HD Denali
GMC Sierra 3500 HD SLE
GMC Sierra 3500 HD SLT
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