Magnaflow Direct Fit Catalytic Converter — Fits 11-16 Silverado/Sierra 2500HD/3500HD

SKU: MAG21-252
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About Magnaflow MagnaFlow has been America's leader in stainless steel ...Read More

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Sale price$927.99
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Car Wheel Size Chart

Wheel Diameter (inches) Tire Width (mm) Aspect Ratio Rim Width (inches)
14185655.5
15195606.0
16205556.5
17215507.0
18225457.5
19235408.0
20245358.5

Note: Wheel and tire sizes vary by car make and model. Always consult your vehicle’s manufacturer for exact specifications.

How to Read Tire Size

Example: 225/45R17 means:

  • 225 = Tire width in mm
  • 45 = Aspect ratio (height as % of width)
  • R17 = Rim diameter in inches

Product Details

Product Description
Part Numbers
Sizing & Fit

About Magnaflow

MagnaFlow has been America's leader in stainless steel performance exhaust since 1981. From the rumbly Pro Street to the OE-quiet Touring series, every MagnaFlow exhaust delivers measurable HP, an unmistakable note, and a lifetime warranty.

Watch in action

Magnaflow Direct-Fit Catalytic Converter for 2011-2017 Chevrolet Silverado/GMC Sierra 2500HD/3500HD

Ensure your heavy-duty Chevrolet Silverado or GMC Sierra (2011-2017, 2500HD/3500HD) maintains optimal emissions control and performance with the Magnaflow OEM Grade Direct-Fit Catalytic Converter (21-252). This high-quality converter is designed for a hassle-free, bolt-on installation, ensuring your truck stays compliant and runs efficiently.

Product Features:

  • Vehicle Specific Fitment: Engineered for a precise fit on 2011-2017 Chevrolet Silverado 2500HD/3500HD and GMC Sierra 2500HD/3500HD models.
  • OEM Grade Compliance: Meets Federal/EPA emissions standards, helping to prevent check engine lights and ensure legal operation.
  • Easy Bolt-On Installation: Designed as a direct replacement, requiring no cutting or welding. Install it yourself with basic tools for a quick and efficient repair.
  • Durable Stainless Steel: Constructed from robust, corrosion-resistant stainless steel for superior longevity and resistance to harsh conditions.
  • Free-Flowing Design: Features mandrel-bent tubing that promotes smooth exhaust flow, optimizing engine performance and efficiency.
  • Leak-Proof Construction: The OE-style spun body and single laser fusion weld construction minimize the risk of exhaust leaks, ensuring a tight seal.

This Magnaflow direct-fit catalytic converter is the perfect solution for replacing a damaged or failing unit on your Silverado or Sierra HD truck. Experience reliable performance and easy installation. Get yours from GGCRACING today!

Vehicle Fitment

Years Make Model Trim
2011-2019 Chevrolet Silverado 2500 HD LT
2011-2019 Chevrolet Silverado 2500 HD LTZ
2011-2019 Chevrolet Silverado 2500 HD WT
2015-2019 Chevrolet Silverado 2500 HD High Country
2011-2019 Chevrolet Silverado 3500 HD LTZ
2011-2019 Chevrolet Silverado 3500 HD WT
2015-2019 Chevrolet Silverado 3500 HD High Country
2017-2019 Chevrolet Suburban 3500 HD LS
2017-2019 Chevrolet Suburban 3500 HD LT
2011-2014 GMC Sierra 2500 HD WT
2011-2019 GMC Sierra 2500 HD Denali
2011-2019 GMC Sierra 2500 HD SLT
2015-2019 GMC Sierra 2500 HD Base
2011-2014 GMC Sierra 3500 HD WT
2011-2019 GMC Sierra 3500 HD Denali
2011-2019 GMC Sierra 3500 HD SLE
2011-2019 GMC Sierra 3500 HD SLT
2015-2019 GMC Sierra 3500 HD Base

Product Details

Product Description
Part Numbers
Sizing & Fit

About Magnaflow

MagnaFlow has been America's leader in stainless steel performance exhaust since 1981. From the rumbly Pro Street to the OE-quiet Touring series, every MagnaFlow exhaust delivers measurable HP, an unmistakable note, and a lifetime warranty.

Watch in action

Magnaflow Direct-Fit Catalytic Converter for 2011-2017 Chevrolet Silverado/GMC Sierra 2500HD/3500HD

Ensure your heavy-duty Chevrolet Silverado or GMC Sierra (2011-2017, 2500HD/3500HD) maintains optimal emissions control and performance with the Magnaflow OEM Grade Direct-Fit Catalytic Converter (21-252). This high-quality converter is designed for a hassle-free, bolt-on installation, ensuring your truck stays compliant and runs efficiently.

Product Features:

  • Vehicle Specific Fitment: Engineered for a precise fit on 2011-2017 Chevrolet Silverado 2500HD/3500HD and GMC Sierra 2500HD/3500HD models.
  • OEM Grade Compliance: Meets Federal/EPA emissions standards, helping to prevent check engine lights and ensure legal operation.
  • Easy Bolt-On Installation: Designed as a direct replacement, requiring no cutting or welding. Install it yourself with basic tools for a quick and efficient repair.
  • Durable Stainless Steel: Constructed from robust, corrosion-resistant stainless steel for superior longevity and resistance to harsh conditions.
  • Free-Flowing Design: Features mandrel-bent tubing that promotes smooth exhaust flow, optimizing engine performance and efficiency.
  • Leak-Proof Construction: The OE-style spun body and single laser fusion weld construction minimize the risk of exhaust leaks, ensuring a tight seal.

This Magnaflow direct-fit catalytic converter is the perfect solution for replacing a damaged or failing unit on your Silverado or Sierra HD truck. Experience reliable performance and easy installation. Get yours from GGCRACING today!

Vehicle Fitment

Years Make Model Trim
2011-2019 Chevrolet Silverado 2500 HD LT
2011-2019 Chevrolet Silverado 2500 HD LTZ
2011-2019 Chevrolet Silverado 2500 HD WT
2015-2019 Chevrolet Silverado 2500 HD High Country
2011-2019 Chevrolet Silverado 3500 HD LTZ
2011-2019 Chevrolet Silverado 3500 HD WT
2015-2019 Chevrolet Silverado 3500 HD High Country
2017-2019 Chevrolet Suburban 3500 HD LS
2017-2019 Chevrolet Suburban 3500 HD LT
2011-2014 GMC Sierra 2500 HD WT
2011-2019 GMC Sierra 2500 HD Denali
2011-2019 GMC Sierra 2500 HD SLT
2015-2019 GMC Sierra 2500 HD Base
2011-2014 GMC Sierra 3500 HD WT
2011-2019 GMC Sierra 3500 HD Denali
2011-2019 GMC Sierra 3500 HD SLE
2011-2019 GMC Sierra 3500 HD SLT
2015-2019 GMC Sierra 3500 HD Base

Product Details

Product Description

About Magnaflow

MagnaFlow has been America's leader in stainless steel performance exhaust since 1981. From the rumbly Pro Street to the OE-quiet Touring series, every MagnaFlow exhaust delivers measurable HP, an unmistakable note, and a lifetime warranty.

Watch in action

Magnaflow Direct-Fit Catalytic Converter for 2011-2017 Chevrolet Silverado/GMC Sierra 2500HD/3500HD

Ensure your heavy-duty Chevrolet Silverado or GMC Sierra (2011-2017, 2500HD/3500HD) maintains optimal emissions control and performance with the Magnaflow OEM Grade Direct-Fit Catalytic Converter (21-252). This high-quality converter is designed for a hassle-free, bolt-on installation, ensuring your truck stays compliant and runs efficiently.

Product Features:

  • Vehicle Specific Fitment: Engineered for a precise fit on 2011-2017 Chevrolet Silverado 2500HD/3500HD and GMC Sierra 2500HD/3500HD models.
  • OEM Grade Compliance: Meets Federal/EPA emissions standards, helping to prevent check engine lights and ensure legal operation.
  • Easy Bolt-On Installation: Designed as a direct replacement, requiring no cutting or welding. Install it yourself with basic tools for a quick and efficient repair.
  • Durable Stainless Steel: Constructed from robust, corrosion-resistant stainless steel for superior longevity and resistance to harsh conditions.
  • Free-Flowing Design: Features mandrel-bent tubing that promotes smooth exhaust flow, optimizing engine performance and efficiency.
  • Leak-Proof Construction: The OE-style spun body and single laser fusion weld construction minimize the risk of exhaust leaks, ensuring a tight seal.

This Magnaflow direct-fit catalytic converter is the perfect solution for replacing a damaged or failing unit on your Silverado or Sierra HD truck. Experience reliable performance and easy installation. Get yours from GGCRACING today!

Vehicle Fitment

Years Make Model Trim
2011-2019 Chevrolet Silverado 2500 HD LT
2011-2019 Chevrolet Silverado 2500 HD LTZ
2011-2019 Chevrolet Silverado 2500 HD WT
2015-2019 Chevrolet Silverado 2500 HD High Country
2011-2019 Chevrolet Silverado 3500 HD LTZ
2011-2019 Chevrolet Silverado 3500 HD WT
2015-2019 Chevrolet Silverado 3500 HD High Country
2017-2019 Chevrolet Suburban 3500 HD LS
2017-2019 Chevrolet Suburban 3500 HD LT
2011-2014 GMC Sierra 2500 HD WT
2011-2019 GMC Sierra 2500 HD Denali
2011-2019 GMC Sierra 2500 HD SLT
2015-2019 GMC Sierra 2500 HD Base
2011-2014 GMC Sierra 3500 HD WT
2011-2019 GMC Sierra 3500 HD Denali
2011-2019 GMC Sierra 3500 HD SLE
2011-2019 GMC Sierra 3500 HD SLT
2015-2019 GMC Sierra 3500 HD Base

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