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MagnaFlow 15-17 C300 L4 2 OEM Close Coupled Direct Fit Converter

SKU: MAG21-504

Catalytic Converters

MAG Converter Direct Fit

MagnaFlow 15-17 C300 L4 2 OEM Close Coupled Direct Fit Converter

SKU: MAG21-504

Catalytic Converters

MAG Converter Direct Fit

A$1,794.60
Special Order. Contact for ETA. This item is out of stock in our warehouse and partner distribution centres. In some cases, this may be due to not having live inventory feeds available for all suppliers. Please contact us before ordering if you need to meet a specific deadline.
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Description

Keep the check engine light off with MagnaFlow OEM Grade Federal/EPA Compliant Direct-Fit Catalytic Converter 21-504. 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 21-504 interchanges with OE parts 274 140 18 08. 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 Overview

Keep the check engine light off with MagnaFlow OEM Grade Federal/EPA Compliant Direct-Fit Catalytic Converter 21-504. 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. Designed to fit the 2016-2021 Mercedes-Benz GLC300, 2015-2018 Mercedes-Benz C300, and more, this direct-fit catalytic converter also interchanges with OE part 274 140 18 08. 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.


Features and Benefits

  • Expertly Crafted To Replicate Oem-Like Flow Dynamics/Maintaining Factory Performance And Fuel Efficiency
  • Your trusted source for EPA-compliant catalytic converters, providing assurance of genuine compliance while delivering quality that will last
  • Simplifies Installation With Essential Gaskets And Hardware Being Included In The Box
  • Your Trusted Source For EPA-Compliant Catalytic Converters
  • High Strength 16 Gauge 409 Stainless Steel Tubing For Exceptional Corrosion Resistance And Maximum Service Life
  • Durable 308 Stainless Steel Mig Welds
  • Mandrel bent tubing retains OEM-like design and geometry, ensuring smooth exhaust flow for peak fuel economy and engine operation
  • Expertly crafted to replicate OEM-like flow dynamics, maintaining factory performance and fuel efficiency

Product Details

Air Tube Adaptable:No
Air Tube Count:0
Body Material:Stainless Steel
Body Type:Spun
CARB Executive Order Number:Not Applicable
California Air Resources Board (CARB) Certified:No
Catalytic Converter Air Tube Adapter:Not Air Tube Kit Adaptable
Clamp Included:No
Clamps Included:No
Converter Quantity:1
Core Substrate Material:Ceramic
Description:OEM Grade Direct-Fit Catalytic Converter
Finish:Stainless Steel
Gasket Included:No
Gasket Or Seal Included:No
Grade Type:Regular
Hanger Included:No
Hangers Included:No
Heat Shield Attached:No
Heat Shield Material:None
Inlet Attachment Type:Clamp-On
Inlet Attachment:Clamp-On
Inlet Gasket Included:No
Inlet Inside Diameter:2.500 in.
Inlet Mounting Hardware Included:No
Inlet Type:Clamp-On
Main Piping Diameter:2.500 in.
Material:Stainless Steel
Mounting Hardware Included:No
Outlet Attachment Type:Clamp-On
Outlet Attachment:Clamp-On
Outlet Gasket Included:No
Outlet Mounting Hardware Included:No
Outlet Outside Diameter:N/A
Outlet Type:Clamp-On
Overall Length:16.875 in.
Oxygen Sensor Location:Pre Converter and Midbed
Part Number:mag21-504
Pipe Material:Stainless Steel
Prop 65 Y/N:No
Sensor Port Count:2
Series:OEM Grade
Substrate Material:Ceramic
Subtitle:Federal / EPA Compliant Direct-Fit Catalytic Converter
Subtitles:Federal / EPA Compliant
Title:MagnaFlow OEM Grade Federal / EPA Compliant Direct-Fit Catalytic Converter 21-504
Tube Material:Stainless Steel
Type:Direct-Fit
Universal Or Specific Fit:Specific
WARNING CA Proposition 65:No

Part Type

Catalytic Converters

Data: v4.2 - Upd: 2026-10-07 19:22:30

Features

  • Durable 308 stainless steel MIG welds
  • 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
  • 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
  • OE-sized barbed exhaust hangers made from corrosion-resistant 410 stainless steel, designed to reduce noise and vibration
  • Simplifies Installation With Essential Gaskets And Hardware Being Included In The Box
  • Your Trusted Source For EPA-Compliant Catalytic Converters
  • Your trusted source for EPA-compliant catalytic converters, providing assurance of genuine compliance while delivering quality that will last

Specifications

Product Attributes - Brand
MagnaFlow
Product Attributes - Manufacturer's Part Number
21-504
Product Attributes - Part Type
Catalytic Converters
Product Attributes - Product Line
MagnaFlow OEM Grade Federal/EPA Compliant Direct-Fit Catalytic Converters
Product Attributes - UPC
888563141787
Product Attributes - Inlet Quantity
1
Product Attributes - Converter Inlet Attachment
Slip fit
Product Attributes - Outlet Quantity
1
Product Attributes - Converter Outlet Attachment
Slip fit
Product Attributes - Converter Case Material
Stainless steel
Product Attributes - Converter Substrate Material
Ceramic substrate
Product Attributes - Converter Overall Length (in.)
16.88
Product Attributes - Converter Style
3-way
Product Attributes - Remanufactured
No
Product Attributes - AIR Tube
No
Product Attributes - Heat Shield
No
Product Attributes - Quantity
Sold individually.

Reference Information

Brand Name/s Magnaflow
StreetFX SKU mag21-504
SFX Item ID 4289495
Supplier Item Code 4289495
Manufacturer SKU 21-504
Manufacturer UPC N/A
Alternative References MFL21-504, MPE-21-504, C300

Compatibility

Application Data
  • MakeMERCEDES-BENZ
    ModelC300
    Submodel4MATIC
    Beginning Year2015
    Ending Year2018
    Engine TypeL4
    Liter2.0
    CC1991
    Engine FamilyMercedes-Benz 4-cylinder
    Engine Size2.0L/1991cc
    DrivetrainAWD
  • MakeMERCEDES-BENZ
    ModelC300
    Submodel4MATIC
    Beginning Year2015
    Ending Year2018
    Engine TypeL4
    Liter2.0
    CC1991
    Engine FamilyMercedes-Benz 4-cylinder
    Engine Size2.0L/1991cc
    DrivetrainAWD
  • MakeMERCEDES-BENZ
    ModelC300
    Submodel4MATIC
    Beginning Year2015
    Ending Year2018
    Engine TypeL4
    Liter2.0
    CC1991
    Engine FamilyMercedes-Benz 4-cylinder
    Engine Size2.0L/1991cc
    DrivetrainAWD
  • MakeMERCEDES-BENZ
    ModelC300
    SubmodelBASE
    Beginning Year2015
    Ending Year2018
    Engine TypeL4
    Liter2.0
    CC1991
    Engine FamilyMercedes-Benz 4-cylinder
    Engine Size2.0L/1991cc
    DrivetrainRWD
  • MakeMERCEDES-BENZ
    ModelC300
    SubmodelBASE
    Beginning Year2015
    Ending Year2018
    Engine TypeL4
    Liter2.0
    CC1991
    Engine FamilyMercedes-Benz 4-cylinder
    Engine Size2.0L/1991cc
    DrivetrainRWD
  • MakeMERCEDES-BENZ
    ModelC300
    SubmodelBASE
    Beginning Year2015
    Ending Year2018
    Engine TypeL4
    Liter2.0
    CC1991
    Engine FamilyMercedes-Benz 4-cylinder
    Engine Size2.0L/1991cc
    DrivetrainRWD
  • MakeMERCEDES-BENZ
    ModelE300
    Submodel4MATIC
    Beginning Year2017
    Ending Year2019
    Engine TypeL4
    Liter2.0
    CC1991
    Engine FamilyMercedes-Benz 4-cylinder
    Engine Size2.0L/1991cc
    DrivetrainAWD
  • MakeMERCEDES-BENZ
    ModelE300
    Submodel4MATIC
    Beginning Year2017
    Ending Year2019
    Engine TypeL4
    Liter2.0
    CC1991
    Engine FamilyMercedes-Benz 4-cylinder
    Engine Size2.0L/1991cc
    DrivetrainAWD
  • MakeMERCEDES-BENZ
    ModelE300
    Submodel4MATIC
    Beginning Year2017
    Ending Year2019
    Engine TypeL4
    Liter2.0
    CC1991
    Engine FamilyMercedes-Benz 4-cylinder
    Engine Size2.0L/1991cc
    DrivetrainAWD
  • MakeMERCEDES-BENZ
    ModelE300
    SubmodelBASE
    Beginning Year2017
    Ending Year2019
    Engine TypeL4
    Liter2.0
    CC1991
    Engine FamilyMercedes-Benz 4-cylinder
    Engine Size2.0L/1991cc
    DrivetrainRWD
  • MakeMERCEDES-BENZ
    ModelE300
    SubmodelBASE
    Beginning Year2017
    Ending Year2019
    Engine TypeL4
    Liter2.0
    CC1991
    Engine FamilyMercedes-Benz 4-cylinder
    Engine Size2.0L/1991cc
    DrivetrainRWD
  • MakeMERCEDES-BENZ
    ModelE300
    SubmodelBASE
    Beginning Year2017
    Ending Year2019
    Engine TypeL4
    Liter2.0
    CC1991
    Engine FamilyMercedes-Benz 4-cylinder
    Engine Size2.0L/1991cc
    DrivetrainRWD
  • MakeMERCEDES-BENZ
    ModelGLC300
    Submodel4MATIC
    Beginning Year2016
    Ending Year2019
    Engine TypeL4
    Liter2.0
    CC1991
    Engine FamilyMercedes-Benz 4-cylinder
    Engine Size2.0L/1991cc
    DrivetrainAWD
  • MakeMERCEDES-BENZ
    ModelGLC300
    Submodel4MATIC
    Beginning Year2016
    Ending Year2019
    Engine TypeL4
    Liter2.0
    CC1991
    Engine FamilyMercedes-Benz 4-cylinder
    Engine Size2.0L/1991cc
    DrivetrainAWD
  • MakeMERCEDES-BENZ
    ModelGLC300
    Submodel4MATIC
    Beginning Year2016
    Ending Year2019
    Engine TypeL4
    Liter2.0
    CC1991
    Engine FamilyMercedes-Benz 4-cylinder
    Engine Size2.0L/1991cc
    DrivetrainAWD
  • MakeMERCEDES-BENZ
    ModelGLC300
    Submodel4MATIC
    Beginning Year2016
    Ending Year2019
    Engine TypeL4
    Liter2.0
    CC1991
    Engine FamilyMercedes-Benz 4-cylinder
    Engine Size2.0L/1991cc
    DrivetrainAWD
    Catalytic Converter PositionFront
  • MakeMERCEDES-BENZ
    ModelGLC300
    SubmodelBASE
    Beginning Year2016
    Ending Year2019
    Engine TypeL4
    Liter2.0
    CC1991
    Engine FamilyMercedes-Benz 4-cylinder
    Engine Size2.0L/1991cc
    DrivetrainRWD
  • MakeMERCEDES-BENZ
    ModelGLC300
    SubmodelBASE
    Beginning Year2016
    Ending Year2019
    Engine TypeL4
    Liter2.0
    CC1991
    Engine FamilyMercedes-Benz 4-cylinder
    Engine Size2.0L/1991cc
    DrivetrainRWD
  • MakeMERCEDES-BENZ
    ModelGLC300
    SubmodelBASE
    Beginning Year2016
    Ending Year2019
    Engine TypeL4
    Liter2.0
    CC1991
    Engine FamilyMercedes-Benz 4-cylinder
    Engine Size2.0L/1991cc
    DrivetrainRWD
  • MakeMERCEDES-BENZ
    ModelGLC300
    SubmodelBASE
    Beginning Year2016
    Ending Year2019
    Engine TypeL4
    Liter2.0
    CC1991
    Engine FamilyMercedes-Benz 4-cylinder
    Engine Size2.0L/1991cc
    DrivetrainRWD
    Catalytic Converter PositionFront
  • MakeMERCEDES-BENZ
    ModelGLC300
    SubmodelBASE
    Beginning Year2020
    Ending Year2021
    Engine TypeL4
    Liter2.0
    CC1991
    Engine FamilyMercedes-Benz 4-cylinder
    Engine Size2.0L/1991cc
    DrivetrainRWD
  • MakeMERCEDES-BENZ
    ModelGLC300
    SubmodelBASE
    Beginning Year2020
    Ending Year2021
    Engine TypeL4
    Liter2.0
    CC1991
    Engine FamilyMercedes-Benz 4-cylinder
    Engine Size2.0L/1991cc
    DrivetrainRWD
  • MakeMERCEDES-BENZ
    ModelGLC300
    SubmodelBASE
    Beginning Year2020
    Ending Year2021
    Engine TypeL4
    Liter2.0
    CC1991
    Engine FamilyMercedes-Benz 4-cylinder
    Engine Size2.0L/1991cc
    DrivetrainRWD
  • MakeMERCEDES-BENZ
    ModelGLC300
    SubmodelBASE
    Beginning Year2020
    Ending Year2021
    Engine TypeL4
    Liter2.0
    CC1991
    Engine FamilyMercedes-Benz 4-cylinder
    Engine Size2.0L/1991cc
    DrivetrainRWD
    Catalytic Converter PositionFront
  • MakeMERCEDES-BENZ
    ModelGLC350E
    Submodel4MATIC
    Beginning Year2018
    Ending Year2019
    Engine TypeL4
    Liter2.0
    CC1991
    Engine FamilyMercedes-Benz Gas/Electric hybrid 4-cylinder
    Engine Size2.0L/1991cc
    DrivetrainAWD

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