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MagnaFlow Direct Fit Catalytic Converter 04-09 Audi S4 4.2L DS MT OE

SKU: MAG49871

Catalytic Converters

MAG Converter Direct Fit...

MagnaFlow Direct Fit Catalytic Converter 04-09 Audi S4 4.2L DS MT OE

SKU: MAG49871

Catalytic Converters

MAG Converter Direct Fit...

A$2,271.36
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 49871. 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. This direct-fit catalytic converter is designed specifically for the 2004-2009 Audi S4 and interchanges with OE parts 8E0 254 505 RX and 8E0 254 502 TX. 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

MagnaFlow specializes in superior catalytic converter and exhaust technology and has spent the past 30+ years earning its reputation as a global market leader. American engineered and manufactured, MagnaFlow Catalytic Converters combine efficient industrial design to produce a product that exceeds, rather than meets, the highest standards of product performance and efficiency in the industry. MagnaFlow uses both Ceramic and Metallic substrates with different combinations of cell density and wall thickness to meet vehicle specific requirements. MagnaFlow Direct-Fit Catalytic Converters are designed for easy bolt-on installation for the Professional Installer. Each is designed to exact the original equipment specifications. While the majority of the Direct-Fit Catalytic Converter products do not require welding, cutting or bending, limited applications may require additional welding for optimal installation. All Federal catalytic converters meet EPA requirements. Federal Catalytic Converters are not legal for sale, installation or use on vehicles registered in the state of California. All California State Catalytic converters are CARB compliant. Converters in this catalog are based on Executive Orders issued by the California Air Resource Board and must be used in accordance with this information. In California, it is illegal to select a catalytic converter for installation based solely on vehicle weight and engine size. * Stainless steel construction * Formulated for Gas and Diesel Applications


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
  • 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
Body Width:4.000 in.
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:2
Core Substrate Material:Ceramic
Description:OEM Grade Direct-Fit Catalytic Converter
Finish:Stainless Steel
Grade Type:Regular
Hangers Included:Yes
Heat Shield Attached:No
Heat Shield Material:None
Inlet Attachment Type:Bolt-On
Inlet Attachment:Bolt-On
Inlet Gasket Included:No
Inlet Inside Diameter:2.500 in.
Inlet Mounting Hardware Included:No
Inlet Type:Bolt-On
Main Piping Diameter:2.5
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:2.000 in.
Outlet Type:Clamp-On
Overall Length:45.625 in.
Oxygen Sensor Location:Pre and Post Converter
Part Number:mag49871
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 2004-2009 Audi S4 OEM Grade Federal / EPA Compliant Direct-Fit Catalytic Converter
Tube Material:Stainless Steel
Type:Direct-Fit
Universal Or Specific Fit:Specific
WARNING CA Proposition 65:No

Part Type

Temp Part Type

Data: v4.2 - Upd: 2026-10-13 22:22:38

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, 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
49871
Product Attributes - Part Type
Catalytic Converters
Product Attributes - Product Line
MagnaFlow Direct-Fit Catalytic Converters
Product Attributes - UPC
888563105338
Product Attributes - Inlet Diameter (in.)
2.50 in.
Product Attributes - Converter Inlet Attachment
Stock flange
Product Attributes - Outlet Diameter (in.)
2.00 in.
Product Attributes - Converter Case Material
Stainless steel
Product Attributes - Converter Substrate Material
Ceramic honeycomb
Product Attributes - Converter Overall Length (in.)
45.63
Product Attributes - Converter Overall Width (in.)
4.00
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 mag49871
SFX Item ID 4289220
Supplier Item Code 4289220
Manufacturer SKU 49871
Manufacturer UPC 888563105338
Alternative References mpe-49871, MFL49871, 4.2L

Compatibility

Application Data
  • UniversalNo
    MakeAUDI
    ModelS4
    SubmodelAVANT
    Beginning Year2004
    Ending Year2008
    Engine TypeV8
    Liter4.2
    CC4163
    Engine FamilyAudi V8
    Engine Size4.2L/4163cc
    DrivetrainAWD
    Catalytic Converter PositionLeft, Catalytic Converter
    Application NotesTransmission Control Type: Manual
  • UniversalNo
    MakeAUDI
    ModelS4
    SubmodelBASE
    Beginning Year2004
    Ending Year2008
    Engine TypeV8
    Liter4.2
    CC4163
    Engine FamilyAudi V8
    Engine Size4.2L/4163cc
    DrivetrainAWD
    Catalytic Converter PositionLeft, Catalytic Converter
    Application NotesTransmission Control Type: Manual
  • UniversalNo
    MakeAUDI
    ModelS4
    SubmodelCABRIOLET
    Beginning Year2004
    Ending Year2009
    Engine TypeV8
    Liter4.2
    CC4163
    Engine FamilyAudi V8
    Engine Size4.2L/4163cc
    DrivetrainAWD
    Catalytic Converter PositionLeft, Catalytic Converter
    Application NotesTransmission Control Type: Manual

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