2003 Audi RS6 Catalytic Converters
Keep Your 2003 Audi RS6 in Top Shape with Quality Catalytic Converters
Whether you’re repairing or upgrading your Catalytic Converter, using high-quality parts is key to keeping your 2003 Audi RS6 looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including . Whether you’re replacing a damaged part or enhancing your truck’s style and protection, you’ll find exactly what you need to get the job done right.
Competitive Prices and Extensive Inventory
The average price for a 2003 Audi RS6 Catalytic Converter at Advance Auto Parts is around $491.82, with a range that starts at $179.99 and goes up to $850.99. With 6 options in stock from one trusted brand, finding the right fit is easy. Popular picks like Universal OEM Grade Federal / EPA Compliant Catalytic Converter, Universal HM Grade Federal / EPA Compliant Catalytic Converter, and Universal California Grade CARB Compliant Catalytic Converter start at just $179.99 and offer a great balance of form and function.
Explore Related Parts
While you’re upgrading or replacing your Catalytic Converter, don’t forget to check out other key components like . At Advance Auto Parts, we’re here to help you keep your 2003 Audi RS6 in peak condition, inside and out.
Essential 2003 Audi RS6 Catalytic Converters
MagnaFlow – Direct-Fit OEM Grade Federal / EPA Compliant Catalytic Converter (Part No.49743)
from
$850.99
Keep the check engine light off with MagnaFlow OEM Grade Federal/EPA Compliant Direct-Fit Catalytic Converter 49743. 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. This Direct-Fit Catalytic Converter is designed to fit the 2003-2004 Audi RS6 4.2L. MagnaFlow 49743 interchanges with OE parts 4B3 253 058 EX. 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 Features:
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Product Features:
- Durable 308 stainless steel MIG welds
- 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
- Durable 308 stainless steel MIG welds
- Simplifies installation with essential gaskets and hardware being included in the box
MagnaFlow – Universal HM Grade Federal / EPA Compliant Catalytic Converter (Part No.99206HM)
from
$179.99
Keep the check engine light off with MagnaFlow HM Grade Federal/EPA Compliant Universal Catalytic Converter 99206HM. The Universal design allows the part to fit a wide array of vehicles, and the stainless steel construction of this catalytic converter is highly resistant to corrosion. 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 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 Federal/EPA Emission systems.
Product Features:
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Product Features:
- Compact, lightweight construction enables installation in confined areas, welding is required
- Compact, lightweight construction enables installation in confined areas, welding is required
- High strength 16 gauge 409 stainless steel tubing for exceptional corrosion resistance and maximum service life
- Your trusted source for EPA-compliant catalytic converters, providing assurance of genuine compliance while delivering quality that will last
- Durable 308 stainless steel MIG welds
MagnaFlow – Universal California Grade CARB Compliant Catalytic Converter (Part No.418004)
from
$438.99
Keep the check engine light off with MagnaFlow California Grade CARB Compliant Universal Catalytic Converter 418004. The Universal design allows the part to fit a wide array of vehicles, and the stainless steel construction of this catalytic converter is highly resistant to corrosion. 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 replacement part is designed to meet or exceed California Air Resource Board requirements, and has undergone additional testing to comply with CARB guidelines to allow for legal use in California and CARB restricted states, for the listed vehicles.
Product Features:
See More
Product Features:
- High strength 16 gauge 409 stainless steel tubing for exceptional corrosion resistance and maximum service life
- Your trusted source for CARB-compliant catalytic converters, providing assurance of genuine compliance while delivering quality that will last
- Compact, lightweight construction enables installation in confined areas, welding is required
- Expertly formulated catalyst blend maximizes efficiency, ensuring optimal emissions control to keep your check engine light off
- High strength 16 gauge 409 stainless steel tubing for exceptional corrosion resistance and maximum service life
MagnaFlow – Universal OEM Grade Federal / EPA Compliant Catalytic Converter (Part No.51206)
from
$194.99
Keep the check engine light off with MagnaFlow OEM Grade Federal/EPA Compliant Universal Catalytic Converter 51206. The Universal design allows the part to fit a wide array of vehicles, and the stainless steel construction of this catalytic converter is highly resistant to corrosion. The single laser fusion welds greatly reduces the possibility of a leak, and our compact, low-mass design also allows for greater thermal efficiency. 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 Federal/EPA Emission systems.
Product Features:
See More
Product Features:
- Your trusted source for EPA-compliant catalytic converters, providing assurance of genuine compliance while delivering quality that will last
- 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
- High strength 16 gauge 409 stainless steel tubing for exceptional corrosion resistance and maximum service life
- Expertly formulated catalyst blend maximizes efficiency, ensuring optimal emissions control to keep your check engine light off
MagnaFlow – Direct-Fit OEM Grade Federal / EPA Compliant Catalytic Converter (Part No.49742)
from
$846.99
Keep the check engine light off with MagnaFlow OEM Grade Federal/EPA Compliant Direct-Fit Catalytic Converter 49742. 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. This Direct-Fit Catalytic Converter is designed to fit the 2003-2004 Audi RS6 4.2L. MagnaFlow 49742 interchanges with OE parts 4B3 253 057 EX. 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 Features:
See More
Product Features:
- Your trusted source for EPA-compliant catalytic converters, providing assurance of genuine compliance while delivering quality that will last
- 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
- High strength 16 gauge 409 stainless steel tubing for exceptional corrosion resistance and maximum service life
- Expertly crafted to replicate OEM-like flow dynamics, maintaining factory performance and fuel efficiency
MagnaFlow – Universal California Grade CARB Compliant Catalytic Converter (Part No.418005)
from
$438.99
Keep the check engine light off with MagnaFlow California Grade CARB Compliant Universal Catalytic Converter 418005. The Universal design allows the part to fit a wide array of vehicles, and the stainless steel construction of this catalytic converter is highly resistant to corrosion. 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 replacement part is designed to meet or exceed California Air Resource Board requirements, and has undergone additional testing to comply with CARB guidelines to allow for legal use in California and CARB restricted states, for the listed vehicles.
Product Features:
See More
Product Features:
- Expertly formulated catalyst blend maximizes efficiency, ensuring optimal emissions control to keep your check engine light off
- Compact, lightweight construction enables installation in confined areas, welding is required
- Expertly formulated catalyst blend maximizes efficiency, ensuring optimal emissions control to keep your check engine light off
- Your trusted source for CARB-compliant catalytic converters, providing assurance of genuine compliance while delivering quality that will last
- High strength 16 gauge 409 stainless steel tubing for exceptional corrosion resistance and maximum service life
Popular 2003 Audi RS6 Catalytic Converters Categories
Most Popular Catalytic Converters for 2003 Audi RS6s
Enhance your 2003 Audi RS6 with one of the 6 Catalytic Converters we have in stock, starting at just $179.99.
MagnaFlow – Universal OEM Grade Federal / EPA Compliant Catalytic Converter (Part No.51206)
from
$194.99
Keep the check engine light off with MagnaFlow OEM Grade Federal/EPA Compliant Universal Catalytic Converter 51206. The Universal design allows the part to fit a wide array of vehicles, and the stainless steel construction of this catalytic converter is highly resistant to corrosion. The single laser fusion welds greatly reduces the possibility of a leak, and our compact, low-mass design also allows for greater thermal efficiency. 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 Federal/EPA Emission systems.
Product Features:
See More
Product Features:
- Your trusted source for EPA-compliant catalytic converters, providing assurance of genuine compliance while delivering quality that will last
- 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
- High strength 16 gauge 409 stainless steel tubing for exceptional corrosion resistance and maximum service life
- Expertly formulated catalyst blend maximizes efficiency, ensuring optimal emissions control to keep your check engine light off
MagnaFlow – Universal California Grade CARB Compliant Catalytic Converter (Part No.418005)
from
$438.99
Keep the check engine light off with MagnaFlow California Grade CARB Compliant Universal Catalytic Converter 418005. The Universal design allows the part to fit a wide array of vehicles, and the stainless steel construction of this catalytic converter is highly resistant to corrosion. 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 replacement part is designed to meet or exceed California Air Resource Board requirements, and has undergone additional testing to comply with CARB guidelines to allow for legal use in California and CARB restricted states, for the listed vehicles.
Product Features:
See More
Product Features:
- Expertly formulated catalyst blend maximizes efficiency, ensuring optimal emissions control to keep your check engine light off
- Compact, lightweight construction enables installation in confined areas, welding is required
- Expertly formulated catalyst blend maximizes efficiency, ensuring optimal emissions control to keep your check engine light off
- Your trusted source for CARB-compliant catalytic converters, providing assurance of genuine compliance while delivering quality that will last
- High strength 16 gauge 409 stainless steel tubing for exceptional corrosion resistance and maximum service life
MagnaFlow – Universal HM Grade Federal / EPA Compliant Catalytic Converter (Part No.99206HM)
from
$179.99
Keep the check engine light off with MagnaFlow HM Grade Federal/EPA Compliant Universal Catalytic Converter 99206HM. The Universal design allows the part to fit a wide array of vehicles, and the stainless steel construction of this catalytic converter is highly resistant to corrosion. 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 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 Federal/EPA Emission systems.
Product Features:
See More
Product Features:
- Compact, lightweight construction enables installation in confined areas, welding is required
- Compact, lightweight construction enables installation in confined areas, welding is required
- High strength 16 gauge 409 stainless steel tubing for exceptional corrosion resistance and maximum service life
- Your trusted source for EPA-compliant catalytic converters, providing assurance of genuine compliance while delivering quality that will last
- Durable 308 stainless steel MIG welds
MagnaFlow – Direct-Fit OEM Grade Federal / EPA Compliant Catalytic Converter (Part No.49743)
from
$850.99
Keep the check engine light off with MagnaFlow OEM Grade Federal/EPA Compliant Direct-Fit Catalytic Converter 49743. 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. This Direct-Fit Catalytic Converter is designed to fit the 2003-2004 Audi RS6 4.2L. MagnaFlow 49743 interchanges with OE parts 4B3 253 058 EX. 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 Features:
See More
Product Features:
- Durable 308 stainless steel MIG welds
- 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
- Durable 308 stainless steel MIG welds
- Simplifies installation with essential gaskets and hardware being included in the box
MagnaFlow – Direct-Fit OEM Grade Federal / EPA Compliant Catalytic Converter (Part No.49742)
from
$846.99
Keep the check engine light off with MagnaFlow OEM Grade Federal/EPA Compliant Direct-Fit Catalytic Converter 49742. 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. This Direct-Fit Catalytic Converter is designed to fit the 2003-2004 Audi RS6 4.2L. MagnaFlow 49742 interchanges with OE parts 4B3 253 057 EX. 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 Features:
See More
Product Features:
- Your trusted source for EPA-compliant catalytic converters, providing assurance of genuine compliance while delivering quality that will last
- 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
- High strength 16 gauge 409 stainless steel tubing for exceptional corrosion resistance and maximum service life
- Expertly crafted to replicate OEM-like flow dynamics, maintaining factory performance and fuel efficiency
MagnaFlow – Universal California Grade CARB Compliant Catalytic Converter (Part No.418004)
from
$438.99
Keep the check engine light off with MagnaFlow California Grade CARB Compliant Universal Catalytic Converter 418004. The Universal design allows the part to fit a wide array of vehicles, and the stainless steel construction of this catalytic converter is highly resistant to corrosion. 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 replacement part is designed to meet or exceed California Air Resource Board requirements, and has undergone additional testing to comply with CARB guidelines to allow for legal use in California and CARB restricted states, for the listed vehicles.
Product Features:
See More
Product Features:
- High strength 16 gauge 409 stainless steel tubing for exceptional corrosion resistance and maximum service life
- Your trusted source for CARB-compliant catalytic converters, providing assurance of genuine compliance while delivering quality that will last
- Compact, lightweight construction enables installation in confined areas, welding is required
- Expertly formulated catalyst blend maximizes efficiency, ensuring optimal emissions control to keep your check engine light off
- High strength 16 gauge 409 stainless steel tubing for exceptional corrosion resistance and maximum service life
FAQs for 2003 Audi RS6 Catalytic Converters
What are the best-selling Catalytic Converters for 2003 Audi RS6s?
Out of 6 Catalytic Converters that fit 2003 Audi RS6s, the following parts are the top sellers:
- Universal OEM Grade Federal / EPA Compliant Catalytic Converter (10605289) – $194.99
- Universal HM Grade Federal / EPA Compliant Catalytic Converter (22315797) – $179.99
- Universal California Grade CARB Compliant Catalytic Converter (11569876) – $438.99
What’s the price range for 2003 Audi RS6 Catalytic Converters?
The prices of Catalytic Converters for the 2003 Audi RS6 range from $179.99 up to $850.99 for the most premium parts.
What is the average price of a Catalytic Converter for a 2003 Audi RS6?
The average price for Catalytic Converters for the 2003 Audi RS6 is $491.82. Keep in mind the variety of part types within our Catalytic Converter category, where you are likely to find a wide range of prices across a variety of parts and components.
What are the cheapest Catalytic Converters for my 2003 Audi RS6?
The cheapest 2003 Audi RS6 Catalytic Converters we carry are:
- Universal HM Grade Federal / EPA Compliant Catalytic Converter (22315797) – $179.99
- Universal OEM Grade Federal / EPA Compliant Catalytic Converter (10605289) – $194.99
- Universal California Grade CARB Compliant Catalytic Converter (11569876) – $438.99
- Universal California Grade CARB Compliant Catalytic Converter (11569673) – $438.99
- Direct-Fit OEM Grade Federal / EPA Compliant Catalytic Converter (11570189) – $846.99
Does Advance Auto Parts sell Catalytic Converters for any other 2003 Audi models?
Yes. We stock Catalytic Converters for 9 other popular 2003 Audi models. Some of the most popular are 2003 S6 Catalytic Converters, 2003 A8 Quattro Catalytic Converters, 2003 S8 Catalytic Converters, and 2003 TT Catalytic Converters.
What types of Catalytic Converters do you sell for my 2003 Audi RS6?
We currently have just 1 Catalytic Converter in stock for a 2003 Audi RS6, and as of 3/1/26, it is .
Can I get help with 2003 Audi RS6 Catalytic Converter orders?
Contact our customer support team by chat or phone, through the help desk page, where you can find instant answers about Audi Catalytic Converters and more.
What is your return policy for Audi RS6 Catalytic Converters?
Advance Auto Parts keeps returns simple. For new Audi RS6 Catalytic Converters and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.