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MagnaFlow 15-16 328i GT xDrive L4 2 OEM Underbody Direct Fit Converter

SKU: MAG21-554

Catalytic Converters

MAG Converter Direct Fit...

MagnaFlow 15-16 328i GT xDrive L4 2 OEM Underbody Direct Fit Converter

SKU: MAG21-554

Catalytic Converters

MAG Converter Direct Fit...

A$1,017.73
Available from MFR. This item is available from the manufacturer's distribution centre. The dispatch timeframe shown is an estimate based on historical order processing and release times for this part. This item is not held in our own warehouse, and actual dispatch timing may vary depending on manufacturer workload and logistics 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 21-554. 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 21-554 includes (2) Torca Clamps and interchanges with OE parts 18 30 7 633 120. 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 21-554. 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 2013-2016 BMW 328i xDrive, 2014-2016 BMW 428i xDrive, and more, this direct-fit catalytic converter also interchanges with OE part 18 30 7 633 120. 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.


Features and Benefits

  • Expertly Crafted To Replicate Oem-Like Flow Dynamics/Maintaining Factory Performance And Fuel Efficiency
  • Torca AccuSeal® Exhaust Clamps provide a full 360-degree equally distributed clamping force preventing pipe distortion while creating a complete seal and maintaining serviceability
  • 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
  • Torca Accuseal Exhaust Clamps Provide A Full 360-Degree Equally Distributed Clamping Force
  • 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
  • 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
  • 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
Body Length:7
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:Yes
Clamps Included:Yes
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:Clamp-On
Inlet Diameter:2.75
Inlet Gasket Included:No
Inlet Inside Diameter:2.750 in.
Inlet Mounting Hardware Included:No
Inlet Quantity:1
Inlet Type:Clamp-On
Main Piping Diameter:3
Material:Stainless Steel
Mounting Hardware Included:Yes
Outlet Attachment:Clamp-On
Outlet Diameter:3
Outlet Gasket Included:No
Outlet Inside Diameter:3
Outlet Mounting Hardware Included:Yes
Outlet Outside Diameter:3.000 in.
Outlet Quantity:1
Outlet Type:Clamp-On
Overall Length:51.5
Oxygen Sensor Location:None
Part Number:mag21-554
Pipe Material:Stainless Steel
Prop 65 Y/N:No
Sensor Port Count:0
Series:OEM Grade
Substrate Material:Ceramic
Substrate:Ceramic
Subtitle:Federal / EPA Compliant Direct-Fit Catalytic Converter
Title:MagnaFlow OEM Grade Federal / EPA Compliant Direct-Fit Catalytic Converter 21-554
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: 2026-10-13 22:22:36

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
  • Torca Accuseal Exhaust Clamps Provide A Full 360-Degree Equally Distributed Clamping Force
  • 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
21-554
Product Attributes - Part Type
Catalytic Converters
Product Attributes - Product Line
MagnaFlow Direct-Fit Catalytic Converters
Product Attributes - UPC
888563173931
Product Attributes - Inlet Quantity
1
Product Attributes - Inlet Diameter (in.)
2.75 in.
Product Attributes - Converter Inlet Attachment
Slip fit
Product Attributes - Outlet Quantity
1
Product Attributes - Outlet Diameter (in.)
3.00 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.)
51.50
Product Attributes - Converter Overall Thickness (in.)
4.00
Product Attributes - Converter Overall Width (in.)
4.00
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 mag21-554
SFX Item ID 4289508
Supplier Item Code 4289508
Manufacturer SKU 21-554
Manufacturer UPC 888563173931
Alternative References MFL21-554, MPE-21-554, 328i

Compatibility

Application Data
  • MakeBMW
    Model328I GT XDRIVE
    SubmodelBASE
    Beginning Year2015
    Ending Year2016
    Engine TypeL4
    Liter2.0
    CID122
    CC1997
    Engine FamilyBMW L4 GAS
    Engine Size2.0L/122
    DrivetrainAWD
    Catalytic Converter PositionRear
  • MakeBMW
    Model328I GT XDRIVE
    SubmodelBASE
    Beginning Year2015
    Ending Year2016
    Engine TypeL4
    Liter2.0
    CID122
    CC1997
    Engine FamilyBMW L4 GAS
    Engine Size2.0L/122
    DrivetrainAWD
    Catalytic Converter PositionRear
  • MakeBMW
    Model328I GT XDRIVE
    SubmodelBASE
    Beginning Year2015
    Ending Year2016
    Engine TypeL4
    Liter2.0
    CID122
    CC1997
    Engine FamilyBMW L4 GAS
    Engine Size2.0L/122
    DrivetrainAWD
    Catalytic Converter PositionRear
  • MakeBMW
    Model328I XDRIVE
    SubmodelBASE
    Beginning Year2013
    Ending Year2016
    Engine TypeL4
    Liter2.0
    CID122
    CC1997
    Engine FamilyBMW L4 GAS
    Engine Size2.0L/122
    DrivetrainAWD
    Catalytic Converter PositionRear
  • MakeBMW
    Model328I XDRIVE
    SubmodelBASE
    Beginning Year2013
    Ending Year2016
    Engine TypeL4
    Liter2.0
    CID122
    CC1997
    Engine FamilyBMW L4 GAS
    Engine Size2.0L/122
    DrivetrainAWD
    Catalytic Converter PositionRear
  • MakeBMW
    Model328I XDRIVE
    SubmodelBASE
    Beginning Year2013
    Ending Year2016
    Engine TypeL4
    Liter2.0
    CID122
    CC1997
    Engine FamilyBMW L4 GAS
    Engine Size2.0L/122
    DrivetrainAWD
    Catalytic Converter PositionRear
  • MakeBMW
    Model428I XDRIVE
    SubmodelBASE
    Beginning Year2014
    Ending Year2016
    Engine TypeL4
    Liter2.0
    CID122
    CC1997
    Engine FamilyBMW L4 GAS
    Engine Size2.0L/122
    DrivetrainAWD
    Catalytic Converter PositionRear
  • MakeBMW
    Model428I XDRIVE
    SubmodelBASE
    Beginning Year2014
    Ending Year2016
    Engine TypeL4
    Liter2.0
    CID122
    CC1997
    Engine FamilyBMW L4 GAS
    Engine Size2.0L/122
    DrivetrainAWD
    Catalytic Converter PositionRear
  • MakeBMW
    Model428I XDRIVE
    SubmodelBASE
    Beginning Year2014
    Ending Year2016
    Engine TypeL4
    Liter2.0
    CID122
    CC1997
    Engine FamilyBMW L4 GAS
    Engine Size2.0L/122
    DrivetrainAWD
    Catalytic Converter PositionRear
  • MakeBMW
    Model428I XDRIVE GRAN COUPE
    SubmodelBASE
    Beginning Year2015
    Ending Year2016
    Engine TypeL4
    Liter2.0
    CID122
    CC1997
    Engine FamilyBMW L4 GAS
    Engine Size2.0L/122
    DrivetrainAWD
    Catalytic Converter PositionRear
  • MakeBMW
    Model428I XDRIVE GRAN COUPE
    SubmodelBASE
    Beginning Year2015
    Ending Year2016
    Engine TypeL4
    Liter2.0
    CID122
    CC1997
    Engine FamilyBMW L4 GAS
    Engine Size2.0L/122
    DrivetrainAWD
    Catalytic Converter PositionRear
  • MakeBMW
    Model428I XDRIVE GRAN COUPE
    SubmodelBASE
    Beginning Year2015
    Ending Year2016
    Engine TypeL4
    Liter2.0
    CID122
    CC1997
    Engine FamilyBMW L4 GAS
    Engine Size2.0L/122
    DrivetrainAWD
    Catalytic Converter PositionRear

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