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MagnaFlow 02-06 Sierra 2500HD 6.0L Direct Fit Converter

SKU: MAG21-989

Catalytic Converters

MAG Converter Direct Fit...

MagnaFlow 02-06 Sierra 2500HD 6.0L Direct Fit Converter

SKU: MAG21-989

Catalytic Converters

MAG Converter Direct Fit...

A$663.23
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

OEM Grade

Keep the check engine light off with MagnaFlow OEM Grade Federal/EPA Compliant Direct-Fit Catalytic Converter 21-989. 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 21-989 includes (1) Flange Gasket and interchanges with OE parts 15070411, 15103202, 15113074, 15147363, 15199832, 15798955. 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.

Additional Information

Magnaflow OEM Grade Direct-Fit Catalytic Converter

Product Overview

Keep the check engine light off with MagnaFlow OEM Grade Federal/EPA Compliant Direct-Fit Catalytic Converter 21-989. 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 2001-2006 Chevrolet Silverado 2500 HD, 2001-2006 GMC Sierra 2500 HD, and more, this direct-fit catalytic converter also interchanges with OE parts 15798955 and 15070411, among others. Avoid potential exhaust leaks by using the included gaskets to get a proper seal. 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.

Additional Application Notes
• OEM Grade Series; Clamp-On Outlet Attachment; 3 in. Tubing; Stainless Steel; Overall L-23.25 in.;Not Legal For Sale Or Use On Vehicles Registered In CA
• Federal Emissions Equipped
• OEM Grade Series; Clamp-On Outlet Attachment; 3 in. Tubing; Stainless Steel; Overall L-23.25 in.;Not Legal For Sale Or Installation In CA/CO/NY

These additional application notes are supplied by the manufacturer and collated from multiple year ranges. Not all of these notes may apply to every year or every variant. Please contact a StreetFX agent for clarification if required.

Data: v4.2 - Upd: 2026-11-09 04:37:03

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

Images are supplied by the manufacturer and may be generic. While all efforts are made to provide accurate pictures, there may be differences in the actual product, such as colour, quantity, version, or included components. Please carefully review the description and specifications for details on inclusions or any variations. Some items may be sold individually or in sets, and images may occasionally depict additional products or quantities not included in your purchase. For assistance or clarification, please contact customer support.

Specifications

Product Details

Air Tube Adaptable:No
Air Tube Count:0
Body Height:5.000 in.
Body Length:8.750 in.
Body Material:Stainless Steel
Body Shape:Round
Body Type:Spun
Body Width:5.000 in.
CARB Executive Order Number:Not Applicable
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:Yes
Gasket Or Seal Included:Yes
Grade Type:Regular
Hanger Included:No
Hangers Included:No
Heat Shield Attached:No
Heat Shield Material:None
Inlet Attachment Type:Bolt-On
Inlet Attachment:Bolt-On
Inlet Diameter:3.000 in.
Inlet Gasket Included:Yes
Inlet Inside Diameter:3.000 in.
Inlet Mounting Hardware Included:No
Inlet Quantity:1
Inlet Type:Bolt-On
Main Piping Diameter:3.000 in.
Material:Stainless Steel
Mounting Hardware Included:Yes
Outlet Attachment Type:Clamp-On
Outlet Attachment:Clamp-On
Outlet Diameter:3.000 in.
Outlet Gasket Included:No
Outlet Inside Diameter:3
Outlet Mounting Hardware Included:No
Outlet Outside Diameter:3.000 in.
Outlet Quantity:1
Outlet Type:Clamp-On
Overall Length:23.250 in.
Oxygen Sensor Location:Post Converter
Part Number:mag21-989
Pipe Material:Stainless Steel
Sensor Port Count:1
Series:OEM Grade
Substrate Material:Ceramic
Substrate:Ceramic
Tube Material:Stainless Steel
Type:Direct-Fit
Universal Or Specific Fit:Specific

Product Downloads

# Document Type Download
1. Technical Bulletin

Installation guides, warranty details, and other supporting documents are provided by the supplier. In some cases, these files may originate from regions outside your locale, meaning instructions, warranty procedures, and images may not fully align with your specific vehicle or region (e.g., LHD vs. RHD differences, return policies, etc.). If you need clarification, please contact a StreetFX support agent.

Data: v2 - Desc: v4.2 - Upd: 2026-11-08 05:12:38

Reference Information

Reference Data (Provide these details to our support team)
Brand Name/s Magnaflow, MagnaFlow Exhaust Products, MAGNAFLOW PERF EXHAUST, Magnaflow Performance
StreetFX SKU mag21-989
SFX Item ID 4289539
Accounting SKU mag-21-989
Manufacturer SKU 21-989
Manufacturer UPC 888563147994
Alternative References 21-989, MFL21-989, MPE-21-989

Catalytic Converter, OEM Grade, Federal/EPA Compliant, Direct-Fit, Stainless Steel Case, 23.250 in. Overall Length, Chevy, GMC, Each

MagnaFlow OEM Grade Federal/EPA Compliant direct-fit catalytic converters provide your vehicle with high-emission compliance, the latest technology, and premium-grade components. Along with those benefits, you also get their industry-leading warranties, so you can drive with confidence. MagnaFlow converters are designed to the exact original equipment specifications, while being engineered to keep the "Check Engine Light" off.

Features include:
• Stainless steel construction
• CNC-precision robotic manufacturing
• Meets or exceeds EPA emissions requirements
• Hassle-free, OE-like fitment tailored to your specific application
• Limited 5-year/50,000 mile warranty on construction
• Limited 25,000 mile warranty on emissions

Product Attributes
BrandMagnaFlow
Manufacturer's Part Number21-989
Part TypeCatalytic Converters
UPC888563147994
Inlet Quantity1
Inlet Diameter (in.)3.00 in.
Converter Inlet AttachmentStock flange
Outlet Quantity1
Outlet Diameter (in.)3.00 in.
Converter Outlet AttachmentSlip fit
Converter Case MaterialStainless steel
Converter Substrate MaterialCeramic substrate
Converter Overall Length (in.)23.25
Converter Style3-way
RemanufacturedNo
AIR TubeNo
Heat ShieldNo
QuantitySold individually.

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