2003 Audi S6 Catalytic Converters
Keep Your 2003 Audi S6 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 S6 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.
Top-Rated Catalytic Converters from Trusted Brands
Looking for a reliable Catalytic Converter? We’ve got you covered with options from brands you know and trust like MagnaFlow. For example, MagnaFlow Catalytic Converters start at just $179.99 with an average 4.1 star rating. With over 16 reviews and a solid 3 star average, you can shop with confidence knowing other Audi S6 owners approve.
Competitive Prices and Extensive Inventory
The average price for a 2003 Audi S6 Catalytic Converter at Advance Auto Parts is around $284.70, with a range that starts at $179.99 and goes up to $605.99. With 7 options in stock from 2 trusted brands, finding the right fit is easy. Popular picks like Ultra EPA Universal Catalytic Converter – 2" Inlet (ID) 2" Outlet (ID), Universal OEM Grade Federal / EPA Compliant Catalytic Converter, and Universal OEM Grade Federal / EPA Compliant Catalytic Converter start at just $194.99 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 S6 in peak condition, inside and out.
Essential 2003 Audi S6 Catalytic Converters
MagnaFlow – Direct-Fit OEM Grade Federal / EPA Compliant Catalytic Converter (Part No.51664)
from
$605.99
Keep the check engine light off with MagnaFlow OEM Grade Federal/EPA Compliant Direct-Fit Catalytic Converter 51664. 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 2000-2004 Audi A6 Quattro 4.2L & 2002-2003 Audi S6 4.2L. MagnaFlow 51664 interchanges with OE parts 4B3 253 058 AX, 4B3 253 058 BX, 4B3 254 550 CX, 4B3 254 550 GX. 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
- Mandrel bent tubing retains OEM-like design and geometry, ensuring smooth exhaust flow for peak fuel economy and engine operation
- 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
- Simplifies installation with essential gaskets and hardware being included in the box
- Durable 308 stainless steel MIG welds
MagnaFlow – Direct-Fit OEM Grade Federal / EPA Compliant Catalytic Converter (Part No.52316)
from
$918.99
Keep the check engine light off with MagnaFlow OEM Grade Federal/EPA Compliant Direct-Fit Catalytic Converter 52316. 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 52316 includes (3) Bolts, (1) Nut and interchanges with OE parts 4G0 254 202 NX. 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:
- Expertly crafted to replicate OEM-like flow dynamics, maintaining factory performance and fuel efficiency
- Mandrel bent tubing retains OEM-like design and geometry, ensuring smooth exhaust flow for peak fuel economy and engine operation
- 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
- Simplifies installation with essential gaskets and hardware being included in the box
- Durable 308 stainless steel MIG welds
MagnaFlow – Universal OEM Grade Federal / EPA Compliant Catalytic Converter (Part No.51205)
from
$194.99
Keep the check engine light off with MagnaFlow OEM Grade Federal/EPA Compliant Universal Catalytic Converter 51205. 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:
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Product Features:
- Compact, lightweight construction enables installation in confined areas, welding is required
- 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
- 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
MagnaFlow – Universal HM Grade Federal / EPA Compliant Catalytic Converter (Part No.99204HM)
from
$179.99
Keep the check engine light off with MagnaFlow HM Grade Federal/EPA Compliant Universal Catalytic Converter 99204HM. 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:
- 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
- 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
Walker – CalCat CARB Universal Catalytic Converter, 2" Inlet (ID) 2"Outlet (ID) (Part No.81301)
from
$401.99
Designed, tested and validated for assured compliance to meet CARB standards, Walker® CalCat® Universal Catalytic Converters are available for OBDII (1996 and newer) and non-OBD (1995 and older) vehicles.
Product Features:
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Product Features:
- SUPERIOR TECHNOLOGY — Optimal high technology washcoat formulated to deliver superior performance (as compared to EPA-compliant converters)
- CONSISTENT PERFORMANCE — Utilizes a precise OE-style coating process to apply catalyst material to the substrate, providing consistent performance for assured emissions compliance
- DURABLE — Features stainless-steel body with aluminized pipe and heat shields for durability
- FLEXIBLE SOLUTION — Customizable design features expandable bushings for easy fitment and may require specialized fabrication and/or welding for installation
- BUY WITH CONFIDENCE — Backed by Walker’s emissionsáandástructural integrity warranty.áVisit Walkerexhaust.com for details
MagnaFlow – Direct-Fit OEM Grade Federal / EPA Compliant Catalytic Converter (Part No.52315)
from
$932.99
Keep the check engine light off with MagnaFlow OEM Grade Federal/EPA Compliant Direct-Fit Catalytic Converter 52315. 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 52315 includes (3) Bolts, (1) Nut and interchanges with OE parts 4G0 254 250 QX, 4G0 254 252 LX. 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
- Mandrel bent tubing retains OEM-like design and geometry, ensuring smooth exhaust flow for peak fuel economy and engine operation
- 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
- Simplifies installation with essential gaskets and hardware being included in the box
- 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
Walker – Ultra EPA Universal Catalytic Converter – 2" Inlet (ID) 2" Outlet (ID) (Part No.93251)
from
$197.99
Product Features:
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- EPA COMPLIANT – For use on OBDII vehicles, 1996 and newer. Not legal for sale or use in CA, CO & NY. Legal in ME on EPA Federal Emission Equipped Vehicles only. Consult your state’s aftermarket converter regulations for details.
- KEEPS CHECK ENGINE LIGHT OFF FOR EMISSIONS CODES – OE-style high-technology wash coat and optimal precious metal load delivers required reduction in tailpipe emissions to match vehicle application
- DURABLE – Features stainless-steel body with aluminized pipe and heat shields for durability
- FLEXIBLE SOLUTION – Customizable design features expandable bushings for easy fitment and may require specialized fabrication and welding for installation
- OE-STYLE DESIGN – Features aluminized heat shields when originally equipped, to match OE design, protecting the undercarriage from heat created by the converter
- BUY WITH CONFIDENCE – Backed by Walker’s 25,000-mile/40,000-kilometer emissions and 50,000-mile/80,000-kilometer structural integrity limited warranty. Visit Walkerexhaust.com for details.
MagnaFlow – Universal HM Grade Federal / EPA Compliant Catalytic Converter (Part No.99205HM)
from
$179.99
Keep the check engine light off with MagnaFlow HM Grade Federal/EPA Compliant Universal Catalytic Converter 99205HM. 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
- Expertly formulated catalyst blend maximizes efficiency, ensuring optimal emissions control to keep your check engine light off
- 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
Walker – CalCat Universal Catalytic Converter (Part No.80801)
from
$142.99
Walker an industry leader for import And domestic applications, offers Walker CalCat Universal Catalytic Converters, available for OBDII (1996 And newer) vehicles And Pre-OBD (1995 And older) vehicles, specifically formulated to comply with California Air Resource Board (CARB) regulations. Walker CalCat Catalytic Converters are legal for sale in the state of California, And any state complying with California regulations.
Product Features:
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Product Features:
- Legal for sale in the state of California, complies with C.A.R.B. regulations
- Stainless steel body with aluminized pipe and heat shields for durability
- Expandable bushings for custom installation requirements
- Universal converter may require modification to complete installation
Walker – CalCat CARB Universal Catalytic Converter – 2" Inlet (ID) 2" Outlet (ID) (Part No.81101)
from
$459.99
Designed, tested and validated for assured compliance to meet CARB standards, Walker CalCat Universal Catalytic Converters are available for OBDII (1996 and newer) and non-OBD (1995 and older) vehicles.
Product Features:
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Product Features:
- CARB COMPLIANT – For use on OBDII vehicles, 1996 and newer and non-OBD 1995 and older. Legal for sale in CA, CO, NY & other states requiring CARB-compliant replacement converters. Consult your state’s aftermarket converter regulations.
- SUPERIOR TECHNOLOGY – Optimal high technology wash coat formulated to deliver superior performance (as compared to EPA-compliant converters)
- CONSISTENT PERFORMANCE – Utilizes a precise OE-style coating process to apply catalyst material to the substrate, providing consistent performance for assured emissions compliance
- DURABLE – Features stainless-steel body with aluminized pipe and heat shields for durability
- FLEXIBLE SOLUTION – Customizable design features expandable bushings for easy fitment and may require specialized fabrication and welding for installation
- BUY WITH CONFIDENCE – Backed by Walker’s 50,000-mile/80,000-kilometer emissions and structural integrity limited warranty
Walker – Standard EPA Universal Catalytic Converter – 2" Inlet (ID) 2" Outlet (ID) (Part No.15051)
from
$99.99
Product Features:
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- EPA COMPLIANT – For use on pre-OBDII vehicles, 1995 and older. Not legal for sale or use in CA, CO and NY. Legal in ME on all pre-OBD vehicles only. Consult your state’s aftermarket converter regulations for details.
- NO BREAK IN REQUIRED – Ready to operate with application-specific converter shell design and mat compression, no converter break in required after installation
- DURABLE – Features stainless-steel body with aluminized pipe and heat shields for durability
- FLEXIBLE SOLUTION – Customizable design features expandable bushings for easy fitment and may require specialized fabrication and welding for installation
- OE-STYLE DESIGN – Features aluminized heat shields when originally equipped, to match OE design, protecting the undercarriage from heat created by the converter
- BUY WITH CONFIDENCE – Backed by Walker’s 25,000-mile/40,000-kilometer emissions and 50,000-mile/80,000-kilometer structural integrity limited warranty. Visit Walkerexhaust.com for details.
MagnaFlow – Universal California Grade CARB Compliant Catalytic Converter (Part No.3322304)
from
$561.99
Keep the check engine light off with MagnaFlow California Grade CARB Compliant Universal Catalytic Converter 3322304. 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:
- Durable 308 stainless steel MIG welds
- 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
- Durable 308 stainless steel MIG welds
- Your trusted source for CARB-compliant catalytic converters, providing assurance of genuine compliance while delivering quality that will last
MagnaFlow – Universal OEM Grade Federal / EPA Compliant Catalytic Converter (Part No.51204)
from
$194.99
Keep the check engine light off with MagnaFlow OEM Grade Federal/EPA Compliant Universal Catalytic Converter 51204. 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:
- Compact, lightweight construction enables installation in confined areas, welding is required
- Durable 308 stainless steel MIG welds
- 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
- Compact, lightweight construction enables installation in confined areas, welding is required
Popular 2003 Audi S6 Catalytic Converters Categories
Most Popular Catalytic Converters for 2003 Audi S6s
Enhance your 2003 Audi S6 with one of the 7 Catalytic Converters we have in stock, starting at just $179.99.
MagnaFlow – Universal HM Grade Federal / EPA Compliant Catalytic Converter (Part No.99205HM)
from
$179.99
Keep the check engine light off with MagnaFlow HM Grade Federal/EPA Compliant Universal Catalytic Converter 99205HM. 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
- Expertly formulated catalyst blend maximizes efficiency, ensuring optimal emissions control to keep your check engine light off
- 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 HM Grade Federal / EPA Compliant Catalytic Converter (Part No.99204HM)
from
$179.99
Keep the check engine light off with MagnaFlow HM Grade Federal/EPA Compliant Universal Catalytic Converter 99204HM. 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:
- 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
- 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
Walker – Ultra EPA Universal Catalytic Converter – 2" Inlet (ID) 2" Outlet (ID) (Part No.93251)
from
$197.99
Product Features:
See More
- EPA COMPLIANT – For use on OBDII vehicles, 1996 and newer. Not legal for sale or use in CA, CO & NY. Legal in ME on EPA Federal Emission Equipped Vehicles only. Consult your state’s aftermarket converter regulations for details.
- KEEPS CHECK ENGINE LIGHT OFF FOR EMISSIONS CODES – OE-style high-technology wash coat and optimal precious metal load delivers required reduction in tailpipe emissions to match vehicle application
- DURABLE – Features stainless-steel body with aluminized pipe and heat shields for durability
- FLEXIBLE SOLUTION – Customizable design features expandable bushings for easy fitment and may require specialized fabrication and welding for installation
- OE-STYLE DESIGN – Features aluminized heat shields when originally equipped, to match OE design, protecting the undercarriage from heat created by the converter
- BUY WITH CONFIDENCE – Backed by Walker’s 25,000-mile/40,000-kilometer emissions and 50,000-mile/80,000-kilometer structural integrity limited warranty. Visit Walkerexhaust.com for details.
MagnaFlow – Universal OEM Grade Federal / EPA Compliant Catalytic Converter (Part No.51205)
from
$194.99
Keep the check engine light off with MagnaFlow OEM Grade Federal/EPA Compliant Universal Catalytic Converter 51205. 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:
- Compact, lightweight construction enables installation in confined areas, welding is required
- 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
- 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
MagnaFlow – Universal OEM Grade Federal / EPA Compliant Catalytic Converter (Part No.51204)
from
$194.99
Keep the check engine light off with MagnaFlow OEM Grade Federal/EPA Compliant Universal Catalytic Converter 51204. 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:
- Compact, lightweight construction enables installation in confined areas, welding is required
- Durable 308 stainless steel MIG welds
- 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
- Compact, lightweight construction enables installation in confined areas, welding is required
MagnaFlow – Direct-Fit OEM Grade Federal / EPA Compliant Catalytic Converter (Part No.51664)
from
$605.99
Keep the check engine light off with MagnaFlow OEM Grade Federal/EPA Compliant Direct-Fit Catalytic Converter 51664. 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 2000-2004 Audi A6 Quattro 4.2L & 2002-2003 Audi S6 4.2L. MagnaFlow 51664 interchanges with OE parts 4B3 253 058 AX, 4B3 253 058 BX, 4B3 254 550 CX, 4B3 254 550 GX. 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
- Mandrel bent tubing retains OEM-like design and geometry, ensuring smooth exhaust flow for peak fuel economy and engine operation
- 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
- Simplifies installation with essential gaskets and hardware being included in the box
- 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
Top-Rated Catalytic Converter Brands For Your 2003 Audi S6
When it comes to finding the perfect Catalytic Converter for your 2003 Audi S6, Advance Auto Parts has you covered with a wide selection of high-quality OEM and aftermarket options from 2 trusted brands. We carry the most popular Catalytic Converter brands including MagnaFlow, and more, all known for their exceptional customer ratings (average brand rating of 4.1 stars) and competitive prices, as low as $179.99. Purchasing a Catalytic Converter from us here at Advance Auto Parts is a smart move for both you and your 2003 Audi S6, providing peace of mind with parts that meet or exceed OEM standards.
Popular MagnaFlow 2003 Audi S6 Catalytic Converters
If you’re looking for a top-quality Catalytic Converter for your 2003 Audi S6, Advance Auto Parts has exactly what you need with our selection of MagnaFlow Catalytic Converters. We have 1 MagnaFlow Catalytic Converters in stock for this fitment, all known for their durability and precision fit. With prices starting at just $179.99, you’ll find the perfect Catalytic Converter for your needs and budget. MagnaFlow Catalytic Converters for the 2003 Audi S6 come highly rated, with over 5 customer reviews and an impressive average rating of 4.1 stars. Choosing a MagnaFlow Catalytic Converter from Advance Auto Parts is a smart move to ensure quality and value for your vehicle.
from
$179.99
(5)
Universal HM Grade Federal / EPA Compliant Catalytic Converter
“needs to be cut to fit my application but worked great”
FAQs for 2003 Audi S6 Catalytic Converters
What are the best-selling Catalytic Converters for 2003 Audi S6s?
Out of 7 Catalytic Converters that fit 2003 Audi S6s, the following parts are the top sellers:
- Ultra EPA Universal Catalytic Converter – 2" Inlet (ID) 2" Outlet (ID) (18390442) – $197.99
- Universal OEM Grade Federal / EPA Compliant Catalytic Converter (10605383) – $194.99
- Universal OEM Grade Federal / EPA Compliant Catalytic Converter (10605381) – $194.99
What’s the price range for 2003 Audi S6 Catalytic Converters?
The prices of Catalytic Converters for the 2003 Audi S6 range from $179.99 up to $605.99 for the most premium parts.
What is the average price of a Catalytic Converter for a 2003 Audi S6?
The average price for Catalytic Converters for the 2003 Audi S6 is $284.70. 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.
Does Advance Auto Parts sell Catalytic Converters for other Audi S6 model years?
What are the cheapest Catalytic Converters for my 2003 Audi S6?
The cheapest 2003 Audi S6 Catalytic Converters we carry are:
- Universal HM Grade Federal / EPA Compliant Catalytic Converter (22315828) – $179.99
- Universal HM Grade Federal / EPA Compliant Catalytic Converter (22315796) – $179.99
- Universal OEM Grade Federal / EPA Compliant Catalytic Converter (10605383) – $194.99
- Universal OEM Grade Federal / EPA Compliant Catalytic Converter (10605381) – $194.99
- Ultra EPA Universal Catalytic Converter – 2" Inlet (ID) 2" Outlet (ID) (18390442) – $197.99
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 A8 Quattro Catalytic Converters, 2003 S8 Catalytic Converters, 2003 TT Catalytic Converters, and 2003 RS6 Catalytic Converters.
What are the top-rated Catalytic Converters that fit the 2003 Audi S6?
The one 2003 Audi S6 Catalytic Converter we have in stock is the Universal HM Grade Federal / EPA Compliant Catalytic Converter. It is rated 3.5 stars and costs $179.99.
What types of Catalytic Converters do you sell for my 2003 Audi S6?
We currently have just 1 Catalytic Converter in stock for a 2003 Audi S6, and as of 3/1/26, it is .
Can I get help with 2003 Audi S6 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 S6 Catalytic Converters?
Advance Auto Parts keeps returns simple. For new Audi S6 Catalytic Converters and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.