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MagnaFlow 15-16 GL450 V6 3 OEM Underbody Direct Fit Converter

SKU: MAG21-551

Catalytic Converters

MAG Converter Direct Fit

MagnaFlow 15-16 GL450 V6 3 OEM Underbody Direct Fit Converter

SKU: MAG21-551

Catalytic Converters

MAG Converter Direct Fit

A$2,855.28
Limited Availability from MFR Limited stock available from the manufacturer's distribution centre. The dispatch timeframe shown is an estimate based on historical orders of this part. This item is not held in our own warehouse, and availability and release timing may vary depending on manufacturer stock movements and processing at the time of ordering.
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Description

Keep the check engine light off with MagnaFlow OEM Grade Federal/EPA Compliant Direct-Fit Catalytic Converter 21-551. 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 21-551 interchanges with OE parts 166 490 79 00, 166 490 85 14. 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 21-551. 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 2017-2019 Mercedes-Benz GLS450, 2017-2019 Mercedes-Benz GLE43 AMG, and more, this direct-fit catalytic converter also interchanges with OE part 166 490 85 14. 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
  • Mandrel Bent Tubing Retains Oem-Like Design And Geometry
  • OE-Sized Barbed Exhaust Hangers Made From Corrosion-Resistant 410 Stainless Steel
  • 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
  • OE-sized barbed exhaust hangers made from corrosion-resistant 410 stainless steel, designed to reduce noise and vibration
  • 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 Height:4.000 in.
Body Length:9.000 in.
Body Material:Stainless Steel
Body Shape:Round
Body Type:Spun
Body Width:4.000 in.
CARB Executive Order Number:Not Applicable
California Air Resources Board (CARB) Certified:No
Catalytic Converter Air Tube Adapter:No
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
Grade Type:Regular
Hangers Included:Yes
Heat Shield Attached:No
Heat Shield Material:None
Inlet Attachment Type:Clamp-On
Inlet Attachment:Clamp-On
Inlet Diameter:3
Inlet Gasket Included:No
Inlet Inside Diameter:3
Inlet Mounting Hardware Included:No
Inlet Quantity:1
Inlet Type:Clamp-On
Main Piping Diameter:2.500 in.
Material:Stainless Steel
Mounting Hardware Included:No
Outlet Attachment:Clamp-On
Outlet Diameter:2.5
Outlet Gasket Included:No
Outlet Inside Diameter:2.5
Outlet Mounting Hardware Included:No
Outlet Outside Diameter:2.500 in.
Outlet Quantity:1
Outlet Type:Clamp-On
Overall Length:44
Oxygen Sensor Location:Pre Converter and Midbed
Part Number:mag21-551
Pipe Material:Stainless Steel
Prop 65 Y/N:No
Sensor Port Count:2
Series:OEM Grade
Shape:Round
Substrate Material:Ceramic
Substrate:Ceramic
Subtitle:Federal / EPA Compliant Direct-Fit Catalytic Converter
Title:MagnaFlow OEM Grade Federal / EPA Compliant Direct-Fit Catalytic Converter 21-551
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: 2026-09-29 07:30:44

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
  • 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
  • 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
21-551
Product Attributes - Part Type
Catalytic Converters
Product Attributes - Product Line
MagnaFlow OEM Grade Federal/EPA Compliant Direct-Fit Catalytic Converters
Product Attributes - UPC
888563157559
Product Attributes - Inlet Quantity
1
Product Attributes - Inlet Diameter (in.)
2.50 in.
Product Attributes - Converter Inlet Attachment
Stock flange
Product Attributes - Outlet Quantity
1
Product Attributes - Outlet Diameter (in.)
2.50 in.
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.)
43.38
Product Attributes - Converter Style
3-way with oxidation
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 mag21-551
SFX Item ID 4289506
Supplier Item Code 4289506
Manufacturer SKU 21-551
Manufacturer UPC 888563157559
Alternative References MFL21-551, MPE-21-551, GL450

Compatibility

Application Data
  • Beginning Year2015
    Catalytic Converter PositionRight
    CC2996
    DrivetrainAWD
    Ending Year2016
    Engine FamilyMERCEDES-BENZ V6 GAS
    Engine Size3.0L/2996cc
    Engine TypeV6
    Liter3.0
    MakeMERCEDES-BENZ
    ModelGL450
    RegionUSA
    Submodel4MATIC
  • Beginning Year2016
    Catalytic Converter PositionRight
    CC2996
    CID183
    DrivetrainAWD
    Ending Year2016
    Engine FamilyMERCEDES-BENZ V6 GAS
    Engine Size3.0L/183
    Engine TypeV6
    Liter3.0
    MakeMERCEDES-BENZ
    ModelGLE400
    RegionUSA
    Submodel4MATIC
  • Beginning Year2016
    Catalytic Converter PositionRight
    CC2996
    DrivetrainAWD
    Ending Year2019
    Engine FamilyMERCEDES-BENZ V6 GAS
    Engine Size3.0L/2996cc
    Engine TypeV6
    Liter3.0
    MakeMERCEDES-BENZ
    ModelGLE400
    RegionUSA
    Submodel4MATIC
  • Application Notes292.364
    Beginning Year2017
    Catalytic Converter PositionRight
    CC2996
    DrivetrainAWD
    Ending Year2019
    Engine FamilyMERCEDES-BENZ V6 GAS
    Engine Size3.0L/2996cc
    Engine TypeV6
    Liter3.0
    MakeMERCEDES-BENZ
    ModelGLE43 AMG
    RegionUSA
    Submodel4MATIC
  • Beginning Year2016
    Catalytic Converter PositionRight
    CC2996
    DrivetrainAWD
    Ending Year2016
    Engine FamilyMERCEDES-BENZ V6 GAS
    Engine Size3.0L/2996cc
    Engine TypeV6
    Liter3.0
    MakeMERCEDES-BENZ
    ModelGLE450 AMG
    RegionUSA
    Submodel4MATIC
  • Beginning Year2017
    Catalytic Converter PositionRight
    CC2996
    DrivetrainAWD
    Ending Year2019
    Engine FamilyMERCEDES-BENZ V6 GAS
    Engine Size3.0L/2996cc
    Engine TypeV6
    Liter3.0
    MakeMERCEDES-BENZ
    ModelGLS450
    RegionUSA
    Submodel4MATIC
  • Beginning Year2015
    Catalytic Converter PositionRight
    CC2996
    DrivetrainAWD
    Ending Year2015
    Engine FamilyMERCEDES-BENZ V6 GAS
    Engine Size3.0L/2996cc
    Engine TypeV6
    Liter3.0
    MakeMERCEDES-BENZ
    ModelML400
    RegionUSA
    Submodel4MATIC

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