2021 Mazda 6 Catalytic Converters

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Keep Your 2021 Mazda 6 in Top Shape with Quality Catalytic Converters

Whether you’re repairing or upgrading your Catalytic Converter, using high-quality parts is key to keeping your 2021 Mazda 6 looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Catalytic Converters. Whether you’re replacing a damaged part or enhancing your truck’s style and protection, you’ll find exactly what you need to get the job done right.

Competitive Prices and Extensive Inventory

The average price for a 2021 Mazda 6 Catalytic Converter at Advance Auto Parts is around $497.99, with a range that starts at $211.99 and goes up to $783.99. With 2 options in stock from one trusted brand, finding the right fit is easy. Popular picks like Oem Grade Federal / Epa Compliant Universal Catalytic Converter and Oem Grade Federal / Epa Compliant Direct-Fit Catalytic Converter start at just $211.99 and offer a great balance of form and function.

Essential 2021 Mazda 6 Catalytic Converters

Walker – Ultra EPA Direct Fit Catalytic Converter with Integrated Exhaust Manifold (Part No.16878)

Ultra EPA Direct Fit Catalytic Converter with Integrated Exhaust Manifold

from

$1006.00
Designed to comply with EPA emissions requirements while delivering premium performance with assured compliance, Walker Ultra EPA-compliant manifold converters are available for import and domestic OBDII (1996 and newer) vehicles and feature an OE-style high-technology washcoat.

Product Features:
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MagnaFlow – California Grade Carb Compliant Universal Catalytic Converter (Part No.5671606)

California Grade Carb Compliant Universal Catalytic Converter

from

$519.99
Keep the check engine light off with MagnaFlow California Grade CARB Compliant Universal Catalytic Converter 5671606. The Universal design allows the part to fit a wide array of vehicles, and the stainless steel construction of this catalytic converter is highly resistant to corrosion. 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 replacement part is designed to meet or exceed California Air Resource Board requirements, and has undergone additional testing to comply with CARB guidelines to allow for legal use in California and CARB restricted states, for the listed vehicles.

Product Features:
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MagnaFlow – California Grade Carb Compliant Universal Catalytic Converter (Part No.441004)

California Grade Carb Compliant Universal Catalytic Converter

from

$548.99
Keep the check engine light off with MagnaFlow California Grade CARB Compliant Universal Catalytic Converter 441004. The Universal design allows the part to fit a wide array of vehicles, and the stainless steel construction of this catalytic converter is highly resistant to corrosion. 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 replacement part is designed to meet or exceed California Air Resource Board requirements, and has undergone additional testing to comply with CARB guidelines to allow for legal use in California and CARB restricted states, for the listed vehicles.

Product Features:
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Walker – CalCat CARB Universal Catalytic Converter 2.5" Inlet (ID) 2.5" Outlet (ID) (Part No.84206)

CalCat CARB Universal Catalytic Converter 2.5" Inlet (ID) 2.5" Outlet (ID)

from

$209.99
Designed, tested and validated for assured compliance to meet CARB standards, Walker CalCat universal catalytic converters are available for OBDII (1996 and newer) and non-OBD (1995 and older) vehicles. Walker CalCat catalytic converters are thoroughly tested to ensure they meet CARB performance requirements.

Product Features:
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MagnaFlow – Hm Grade Federal / Epa Compliant Universal Catalytic Converter (Part No.99206HM)

Hm Grade Federal / Epa Compliant Universal Catalytic Converter

from

$194.99
Keep the check engine light off with MagnaFlow HM Grade Federal/EPA Compliant Universal Catalytic Converter 99206HM. The Universal design allows the part to fit a wide array of vehicles, and the stainless steel construction of this catalytic converter is highly resistant to corrosion. 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 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 Federal/EPA Emission systems.

Product Features:
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MagnaFlow – Oem Grade Federal / Epa Compliant Direct-Fit Catalytic Converter (Part No.49202)

Oem Grade Federal / Epa Compliant Direct-Fit Catalytic Converter

from

$1057.00
Keep the check engine light off with MagnaFlow OEM Grade Federal/EPA Compliant Direct-Fit Catalytic Converter 49202. 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 49202 includes (1) Donut Gasket, (1) Flat Ring Gasket and interchanges with OE parts AE5Z-5E212-M, CA01-20-600, CA01-20-600A, CA01-20-600B, CA01-20-600C, CY01-20-600, CY01-20-600A. 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.

Product Features:
  • Durable 308 stainless steel MIG welds
  • Simplifies installation with essential gaskets and hardware being included in the box
  • Expertly crafted to replicate OEM-like flow dynamics, maintaining factory performance and fuel efficiency
  • High strength 16 gauge 409 stainless steel tubing for exceptional corrosion resistance and maximum service life
  • OE-sized barbed exhaust hangers made from corrosion-resistant 410 stainless steel, designed to reduce noise and vibration
  • Mandrel bent tubing retains OEM-like design and geometry, ensuring smooth exhaust flow for peak fuel economy and engine operation
  • Your trusted source for EPA-compliant catalytic converters, providing assurance of genuine compliance while delivering quality that will last
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Walker – Ultra EPA Direct Fit Catalytic Converter (Part No.16890)

Ultra EPA Direct Fit Catalytic Converter

from

$266.99
Designed to comply with EPA standards while delivering premium performance with assured compliance, Walker Ultra direct-fit catalytic converters are available for import and domestic OBDII (1996 and newer) vehicles. Count on Walker Ultra converters for industry-leading fit and function.

Product Features:
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Walker – Ultra EPA Direct Fit Catalytic Converter 2.5" Outlet (OD) (Part No.16588)

Ultra EPA Direct Fit Catalytic Converter 2.5" Outlet (OD)

from

$908.99
Designed to comply with EPA standards while delivering premium performance with assured compliance, Walker Ultra direct-fit catalytic converters are available for import and domestic OBDII (1996 and newer) vehicles. Count on Walker Ultra converters for industry-leading fit and function.

Product Features:
  • EPA COMPLIANT — For use on OBDII vehicles, 1996 and newer. Not legal for sale or use in CA, CO & NY. Legal in ME on EPA Federal Emission Equipped Vehicles only. Consult your state’s aftermarket converter regulations for details.
  • DIRECT-FIT DESIGN — Direct-fit bolt-on replacement solution with OE-style hangers, brackets, routings and heat shields for easy installation that doesn’t require specialized fabrication and/or welding
  • KEEPS CHECK ENGINE LIGHT OFF FOR EMISSIONS CODES — OE-style high-technology washcoat and optimal precious metal load delivers required reduction in tailpipe emissions to match vehicle application
  • STRONG AND DURABLE — Features thick OE-style flanges, hangers and brackets for strength and durability
  • OE-STYLE DESIGN — Features aluminized heat shields when originally equipped, to match OE design, protecting the undercarriage from heat created by the converter
  • BUY WITH CONFIDENCE — Backed by Walker’s 25,000-mile/40,000-kilometer emissions and 5-year 50,000-mile/80,000-kilometer structural integrity warranty. Visit Walkerexhaust.com for details.
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MagnaFlow – Oem Grade Federal / Epa Compliant Universal Catalytic Converter (Part No.51206)

Oem Grade Federal / Epa Compliant Universal Catalytic Converter

from

$211.99
Keep the check engine light off with MagnaFlow OEM Grade Federal/EPA Compliant Universal Catalytic Converter 51206. The Universal design allows the part to fit a wide array of vehicles, and the stainless steel construction of this catalytic converter is highly resistant to corrosion. The single laser fusion welds greatly reduces the possibility of a leak, and our compact, low-mass design also allows for greater thermal efficiency. 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 Federal/EPA Emission systems.

Product Features:
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Walker – Ultra EPA Direct Fit Catalytic Converter Overall Length 26.500 IN (Part No.16335)

Ultra EPA Direct Fit Catalytic Converter Overall Length 26.500 IN

from

$796.99
Designed to comply with EPA standards while delivering premium performance with assured compliance, Walker Ultra direct-fit catalytic converters are available for import and domestic OBDII (1996 and newer) vehicles. Count on Walker Ultra converters for industry-leading fit and function.

Product Features:
  • EPA COMPLIANT — For use on OBDII vehicles, 1996 and newer. Not legal for sale or use in CA, CO & NY. Legal in ME on EPA Federal Emission Equipped Vehicles only. Consult your state’s aftermarket converter regulations for details.
  • DIRECT-FIT DESIGN — Direct-fit bolt-on replacement solution with OE-style hangers, brackets, routings and heat shields for easy installation that doesn’t require specialized fabrication and/or welding
  • KEEPS CHECK ENGINE LIGHT OFF FOR EMISSIONS CODES — OE-style high-technology washcoat and optimal precious metal load delivers required reduction in tailpipe emissions to match vehicle application
  • STRONG AND DURABLE — Features thick OE-style flanges, hangers and brackets for strength and durability
  • OE-STYLE DESIGN — Features aluminized heat shields when originally equipped, to match OE design, protecting the undercarriage from heat created by the converter
  • BUY WITH CONFIDENCE — Backed by Walker’s 25,000-mile/40,000-kilometer emissions and 5-year 50,000-mile/80,000-kilometer structural integrity warranty. Visit Walkerexhaust.com for details.
See More

MagnaFlow – Oem Grade Federal / Epa Compliant Direct-Fit Catalytic Converter (Part No.51739)

Oem Grade Federal / Epa Compliant Direct-Fit Catalytic Converter

from

$451.99
Keep the check engine light off with MagnaFlow OEM Grade Federal/EPA Compliant Direct-Fit Catalytic Converter 51739. 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. This Direct-Fit Catalytic Converter is designed to fit the 2003-2005 Mazda 6 3.0L. MagnaFlow 51739 includes (1) Bolt, (2) Flat Ring Gaskets and interchanges with OE parts AJ57-20-550C, AJ57-20-550E, AJ59-20-550F, AJ59-20-550G, AJB4-20-550, AJB4-20-550A. 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.

Product Features:
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MagnaFlow – Oem Grade Federal / Epa Compliant Direct-Fit Catalytic Converter (Part No.49232)

Oem Grade Federal / Epa Compliant Direct-Fit Catalytic Converter

from

$514.99
Keep the check engine light off with MagnaFlow OEM Grade Federal/EPA Compliant Direct-Fit Catalytic Converter 49232. 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. This Direct-Fit Catalytic Converter is designed to fit the 2006-2008 Mazda 6 3.0L. MagnaFlow 49232 includes (2) Flat Ring Gaskets and interchanges with OE parts AJ48-20-60X, AJ48-20-60XA, AJ48-20-60XB, AJ48-20-60XC. 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.

Product Features:
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MagnaFlow – Oem Grade Federal / Epa Compliant Direct-Fit Catalytic Converter (Part No.51899)

Oem Grade Federal / Epa Compliant Direct-Fit Catalytic Converter

from

$477.99
Keep the check engine light off with MagnaFlow OEM Grade Federal/EPA Compliant Direct-Fit Catalytic Converter 51899. 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. This Direct-Fit Catalytic Converter is designed to fit the 2006-2008 Mazda 6 2.3L. MagnaFlow 51899 includes (3) Bolts, (1) Donut Gasket, (1) Flat Ring Gasket and interchanges with OE parts L362-20-55X, L362-20-55XA, L362-20-55XB, L362-20-55XC, L362-20-55XD. 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.

Product Features:
  • Durable 308 stainless steel MIG welds
  • Simplifies installation with essential gaskets and hardware being included in the box
  • Expertly crafted to replicate OEM-like flow dynamics, maintaining factory performance and fuel efficiency
  • High strength 16 gauge 409 stainless steel tubing for exceptional corrosion resistance and maximum service life
  • OE-sized barbed exhaust hangers made from corrosion-resistant 410 stainless steel, designed to reduce noise and vibration
  • Mandrel bent tubing retains OEM-like design and geometry, ensuring smooth exhaust flow for peak fuel economy and engine operation
  • Your trusted source for EPA-compliant catalytic converters, providing assurance of genuine compliance while delivering quality that will last
See More

MagnaFlow – Oem Grade Federal / Epa Compliant Direct-Fit Catalytic Converter (Part No.51120)

Oem Grade Federal / Epa Compliant Direct-Fit Catalytic Converter

from

$1047.00
Keep the check engine light off with MagnaFlow OEM Grade Federal/EPA Compliant Direct-Fit Catalytic Converter 51120. 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. This Direct-Fit Catalytic Converter is designed to fit the 2003-2006 Mazda 6 2.3L. MagnaFlow 51120 includes (1) Donut Gasket, (1) Flange Gasket and interchanges with OE parts L304-20-55XC, L304-20-55XD, L304-20-55XE, L304-20-55XF, L304-20-55XG, L332-20-55XC, L362-20-55X, L362-20-55XA, L362-20-55XB, L362-20-55XC, L362-20-55XD, L363-20-55X, L363-20-55XA, L363-20-55XB. 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.

Product Features:
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MagnaFlow – Oem Grade Federal / Epa Compliant Universal Catalytic Converter (Part No.51174)

Oem Grade Federal / Epa Compliant Universal Catalytic Converter

from

$194.99
Keep the check engine light off with MagnaFlow OEM Grade Federal/EPA Compliant Universal Catalytic Converter 51174. The Universal design allows the part to fit a wide array of vehicles, and the stainless steel construction of this catalytic converter is highly resistant to corrosion. The single laser fusion welds greatly reduces the possibility of a leak, and our compact, low-mass design also allows for greater thermal efficiency. 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 Federal/EPA Emission systems.

Product Features:
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Walker – CalCat CARB Universal Catalytic Converter 2" Inlet (ID) 2" Outlet (ID) (Part No.84408)

CalCat CARB Universal Catalytic Converter 2" Inlet (ID) 2" Outlet (ID)

from

$453.99
Designed, tested and validated for assured compliance to meet CARB standards, Walker CalCat universal catalytic converters are available for OBDII (1996 and newer) and non-OBD (1995 and older) vehicles. Walker CalCat catalytic converters are thoroughly tested to ensure they meet CARB performance requirements.

Product Features:
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MagnaFlow – California Grade Carb Compliant Universal Catalytic Converter (Part No.4481355)

California Grade Carb Compliant Universal Catalytic Converter

from

$944.99
Keep the check engine light off with MagnaFlow California Grade CARB Compliant Universal Catalytic Converter 4481355. The Universal design allows the part to fit a wide array of vehicles, and the stainless steel construction of this catalytic converter is highly resistant to corrosion. 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 replacement part is designed to meet or exceed California Air Resource Board requirements, and has undergone additional testing to comply with CARB guidelines to allow for legal use in California and CARB restricted states, for the listed vehicles.

Product Features:
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Walker – CalCat CARB Universal Catalytic Converter 2" Inlet (ID) 2"Outlet (ID) (Part No.84218)

CalCat CARB Universal Catalytic Converter 2" Inlet (ID) 2"Outlet (ID)

from

$539.99
Designed, tested and validated for assured compliance to meet CARB standards, Walker CalCat universal catalytic converters are available for OBDII (1996 and newer) and non-OBD (1995 and older) vehicles. Walker CalCat catalytic converters are thoroughly tested to ensure they meet CARB performance requirements.

Product Features:
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Walker – Ultra EPA Universal Catalytic Converter 2.25" Inlet (ID) 2.25" Outlet (ID) (Part No.93202)

Ultra EPA Universal Catalytic Converter 2.25" Inlet (ID) 2.25" Outlet (ID)

from

$184.99
Designed to meet EPA emissions requirements while delivering premium performance and durability, Walker Ultra universal catalytic converters fit import and domestic OBDII (1996 and newer) vehicles. Each converter features an OE style high technology washcoat with an optimal precious metal load for assured compliance.

Product Features:
  • EPA COMPLIANT — For use on OBDII vehicles, 1996 and newer. Not legal for sale or use in CA, CO & NY. Legal in ME on EPA Federal Emission Equipped Vehicles only. Consult your state’s aftermarket converter regulations for details.
  • KEEPS CHECK ENGINE LIGHT OFF FOR EMISSIONS CODES — OE-style high-technology washcoat and optimal precious metal load delivers required reduction in tailpipe emissions to match vehicle application
  • DURABLE — Features stainless-steel body with aluminized pipe and heat shields for durability
  • FLEXIBLE SOLUTION — Customizable design features expandable bushings for easy fitment and may require specialized fabrication and/or welding for installation
  • OE-STYLE DESIGN — Features aluminized heat shields when originally equipped, to match OE design, protecting the undercarriage from heat created by the converter
  • BUY WITH CONFIDENCE — Backed by Walker’s 25,000-mile/40,000-kilometer emissions and 5-year 50,000-mile/80,000-kilometer structural integrity warranty. Visit Walkerexhaust.com for details.
See More

MagnaFlow – Oem Grade Federal / Epa Compliant Universal Catalytic Converter (Part No.51205)

Oem Grade Federal / Epa Compliant Universal Catalytic Converter

from

$211.99
Keep the check engine light off with MagnaFlow OEM Grade Federal/EPA Compliant Universal Catalytic Converter 51205. The Universal design allows the part to fit a wide array of vehicles, and the stainless steel construction of this catalytic converter is highly resistant to corrosion. The single laser fusion welds greatly reduces the possibility of a leak, and our compact, low-mass design also allows for greater thermal efficiency. 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 Federal/EPA Emission systems.

Product Features:
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MagnaFlow – Hm Grade Federal / Epa Compliant Universal Catalytic Converter (Part No.99356HM)

Hm Grade Federal / Epa Compliant Universal Catalytic Converter

from

$204.99
Keep the check engine light off with MagnaFlow HM Grade Federal/EPA Compliant Universal Catalytic Converter 99356HM. The Universal design allows the part to fit a wide array of vehicles, and the stainless steel construction of this catalytic converter is highly resistant to corrosion. 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 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 Federal/EPA Emission systems.

Product Features:
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MagnaFlow – Oem Grade Federal / Epa Compliant Direct-Fit Manifold Catalytic Converter (Part No.51277)

Oem Grade Federal / Epa Compliant Direct-Fit Manifold Catalytic Converter

from

$865.99
Keep the check engine light off with MagnaFlow OEM Grade Federal/EPA Compliant Direct-Fit Manifold Catalytic Converter 51277. 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. This Direct-Fit Manifold Catalytic Converter is designed to fit the 2003-2005 Mazda 6 3.0L. MagnaFlow 51277 includes (2) Nuts, (2) Bolts, (2) Flat Washers, (1) Flange Gasket, (1) Flat Ring Gasket and interchanges with OE parts AJ57-20-50X, AJ57-20-50XA, AJ57-20-50XB, AJ57-20-50XC, AJB4-20-50X, AJB4-20-50XA, AJB4-20-50XB. 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.

Product Features:
  • Durable 308 stainless steel MIG welds
  • Simplifies installation with essential gaskets and hardware being included in the box
  • Expertly crafted to replicate OEM-like flow dynamics, maintaining factory performance and fuel efficiency
  • High strength 16 gauge 409 stainless steel tubing for exceptional corrosion resistance and maximum service life
  • Mandrel bent tubing retains OEM-like design and geometry, ensuring smooth exhaust flow for peak fuel economy and engine operation
  • Your trusted source for EPA-compliant catalytic converters, providing assurance of genuine compliance while delivering quality that will last
See More

MagnaFlow – Oem Grade Federal / Epa Compliant Universal Catalytic Converter (Part No.51204)

Oem Grade Federal / Epa Compliant Universal Catalytic Converter

from

$211.99
Keep the check engine light off with MagnaFlow OEM Grade Federal/EPA Compliant Universal Catalytic Converter 51204. The Universal design allows the part to fit a wide array of vehicles, and the stainless steel construction of this catalytic converter is highly resistant to corrosion. The single laser fusion welds greatly reduces the possibility of a leak, and our compact, low-mass design also allows for greater thermal efficiency. 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 Federal/EPA Emission systems.

Product Features:
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Walker – CalCat CARB Universal Catalytic Converter 2.25" Inlet (ID) 2.25" Outlet (ID) (Part No.84205)

CalCat CARB Universal Catalytic Converter 2.25" Inlet (ID) 2.25" Outlet (ID)

from

$206.99
Designed, tested and validated for assured compliance to meet CARB standards, Walker CalCat universal catalytic converters are available for OBDII (1996 and newer) and non-OBD (1995 and older) vehicles. Walker CalCat catalytic converters are thoroughly tested to ensure they meet CARB performance requirements.

Product Features:
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Dorman – Manifold Converter – Not CARB Compliant – Not For Sale – NY – CA – ME (Part No.674-866)

Manifold Converter - Not CARB Compliant - Not For Sale - NY - CA - ME

from

$404.99
This catalytic converter with integrated exhaust manifold – a.k.a. manifold converter – is precision-engineered to match the original equipment on specific vehicle years, makes and models for a reliable replacement.

Product Features:
  • Direct replacement – this manifold converter is designed to match the fit and performance of the original equipment on specific vehicles
  • Convenient kit – includes gaskets and downpipe hardware to simplify installation
  • Durable construction -manufactured within strict tolerances for reliable longevity
  • Trustworthy value – backed by team of engineers and quality control experts in the United States
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MagnaFlow – California Grade Carb Compliant Universal Catalytic Converter (Part No.5671635)

California Grade Carb Compliant Universal Catalytic Converter

from

$538.99
Keep the check engine light off with MagnaFlow California Grade CARB Compliant Universal Catalytic Converter 5671635. The Universal design allows the part to fit a wide array of vehicles, and the stainless steel construction of this catalytic converter is highly resistant to corrosion. 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 replacement part is designed to meet or exceed California Air Resource Board requirements, and has undergone additional testing to comply with CARB guidelines to allow for legal use in California and CARB restricted states, for the listed vehicles.

Product Features:
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MagnaFlow – California Grade Carb Compliant Universal Catalytic Converter (Part No.457204)

California Grade Carb Compliant Universal Catalytic Converter

from

$381.99
Keep the check engine light off with MagnaFlow California Grade CARB Compliant Universal Catalytic Converter 457204. The Universal design allows the part to fit a wide array of vehicles, and the stainless steel construction of this catalytic converter is highly resistant to corrosion. 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 replacement part is designed to meet or exceed California Air Resource Board requirements, and has undergone additional testing to comply with CARB guidelines to allow for legal use in California and CARB restricted states, for the listed vehicles.

Product Features:
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MagnaFlow – Oem Grade Federal / Epa Compliant Direct-Fit Catalytic Converter (Part No.21-326)

Oem Grade Federal / Epa Compliant Direct-Fit Catalytic Converter

from

$783.99
Keep the check engine light off with MagnaFlow OEM Grade Federal/EPA Compliant Direct-Fit Catalytic Converter 21-326. 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 21-326 includes (2) Bolts, (2) Torca Clamps, (2) Flat Ring Gaskets and interchanges with OE parts PE70-20-55XA, PEB4-20-55XA, PEB4-20-55XB, PEB4-20-55XC, PEM5-20-55X, PEM5-20-55XA, PEM5-20-55XB, PY03-20-55X, PY31-20-55XA, PY81-20-55X, PYA1-20-55X. 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.

Product Features:
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Most Popular Catalytic Converters for 2021 Mazda 6s

Enhance your 2021 Mazda 6 with one of the 2 Catalytic Converters we have in stock, starting at just $211.99.

MagnaFlow – Oem Grade Federal / Epa Compliant Universal Catalytic Converter (Part No.51205)

Oem Grade Federal / Epa Compliant Universal Catalytic Converter

from

$211.99
Keep the check engine light off with MagnaFlow OEM Grade Federal/EPA Compliant Universal Catalytic Converter 51205. The Universal design allows the part to fit a wide array of vehicles, and the stainless steel construction of this catalytic converter is highly resistant to corrosion. The single laser fusion welds greatly reduces the possibility of a leak, and our compact, low-mass design also allows for greater thermal efficiency. 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 Federal/EPA Emission systems.

Product Features:
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MagnaFlow – Oem Grade Federal / Epa Compliant Direct-Fit Catalytic Converter (Part No.21-326)

Oem Grade Federal / Epa Compliant Direct-Fit Catalytic Converter

from

$783.99
Keep the check engine light off with MagnaFlow OEM Grade Federal/EPA Compliant Direct-Fit Catalytic Converter 21-326. 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 21-326 includes (2) Bolts, (2) Torca Clamps, (2) Flat Ring Gaskets and interchanges with OE parts PE70-20-55XA, PEB4-20-55XA, PEB4-20-55XB, PEB4-20-55XC, PEM5-20-55X, PEM5-20-55XA, PEM5-20-55XB, PY03-20-55X, PY31-20-55XA, PY81-20-55X, PYA1-20-55X. 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.

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FAQs for 2021 Mazda 6 Catalytic Converters

What are the best-selling Catalytic Converters for 2021 Mazda 6s?

Out of 2 Catalytic Converters that fit 2021 Mazda 6s, the following parts are the top sellers:

What’s the price range for 2021 Mazda 6 Catalytic Converters?

The prices of Catalytic Converters for the 2021 Mazda 6 range from $211.99 up to $783.99 for the most premium parts.

What is the average price of a Catalytic Converter for a 2021 Mazda 6?

The average price for Catalytic Converters for the 2021 Mazda 6 is $497.99. Keep in mind the variety of part types within our Catalytic Converter category, where you are likely to find a wide range of prices across a variety of parts and components.

Does Advance Auto Parts sell Catalytic Converters for other Mazda 6 model years?

Yes, we carry Catalytic Converters for 17 model years of Mazda 6s between 2003 and 2020. The following model years are the most popular for Catalytic Converter purchases: 2018, 2017, 2016, 2015, 2014, 2013, 2012, 2011, and 2010.

What are the cheapest Catalytic Converters for my 2021 Mazda 6?

The cheapest 2021 Mazda 6 Catalytic Converters we carry are:

Does Advance Auto Parts sell Catalytic Converters for any other 2021 Mazda models?

Yes. We stock Catalytic Converters for 2 other popular 2021 Mazda models. Some of the most popular are 2021 CX-9 Catalytic Converters, 2021 CX-5 Catalytic Converters, and 2021 CX-3 Catalytic Converters.

What types of Catalytic Converters do you sell for my 2021 Mazda 6?

We currently have just 1 Catalytic Converter in stock for a 2021 Mazda 6, and as of 6/2/26, it is a Catalytic Converter.

Can I get help with 2021 Mazda 6 Catalytic Converter orders?

Contact our customer support team by chat or phone, through the help desk page, where you can find instant answers about Mazda Catalytic Converters and more.

What is your return policy for Mazda 6 Catalytic Converters?

Advance Auto Parts keeps returns simple. For new Mazda 6 Catalytic Converters and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.