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Catalytic Converter for 2003 Audi A6 Quattro

We have 49 Items In-stock. Select your vehicle's Submodel to continue.

Eastern 49-state legal Universal Catalytic Converter

Eastern 49-State Legal Universal Catalytic Converters

  • NANO technology for better converter efficiency
  • Advanced materials design for optimum engine output and catalytic efficiency
  • Complete range of inlet and outlet diameters
  • Non-directional for ease of installation
Backed by 3 decades of product expertise, Eastern continues to invest in state-of-the-art production equipment to guarantee only the best for their customers - making them ready for the future.

Note:
  • 49-state legal; Not legal in California and other states adopting California Emissions Standards; Not for sale or use in California and other states adopting California Emissions Standards; Cannot be shipped to California and such states
Eastern Catalytic Converter, Eastern Standard, Rear, 49-State Legal - No CA Shipments
$51.93 List Price $61.28 Save $9.35 Availability: In Stock
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  • SKU#: EAST70316
  • Product Fit: Minor Modifications
  • Quantity Sold: Sold Individually
  • Tube Material: Aluminized Steel
  • Anticipated Ship Out Time: 1-2 Business Days
  • Catalyst Substrate Material: Ceramic honeycomb
  • Dimensions: 6 x 4.25 x 10 in., 14 in. overall length
  • Warranty: 5-year or 50,000-mile Eastern limited warranty
see more Fits the following 2003 Audi A6 Quattro submodels:
  • 6 Cyl 2.7L | Base
Rating: (see review/s)

"Came very fast. I ordered it round a lil before 1 on a tuesday and it was at my house friday morning. It was the right part and the price was way less than if I had bought it from a local auto parts store. Two things to know; you need to be sure everything that caused it to go bad has been fixed if not you will eventually kill the new one so get your check engine light off first. Clean out your egr valve if you didnt need to replace it might as well replace your pcv valve cuz its only $3 and clean out the area where its seated and if an O2 sensor is bad replace it the only two on this car (2000 model year) are right in the area of catalytic. Also if your flex pipe is bad you can just a flex pipe so you may be able to piece it together without having to buy the converter with the pipe to manifold. I ended up replacing or cleaning almost my whole emissions system to get it to pass the state test. With the help of this site and my own ingenuity what would have been over $500 in parts cost less than $140 not bad at all!!" posted by: In Cleveland on January 26, 2014 view all 8 reviews

Eastern Catalytic Converter, Eastern Standard, Driver Or Passenger Side, 49-State Legal - No CA Shipments
$51.70 List Price $61.01 Save $9.31 Availability: In Stock
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  • SKU#: EAST70318
  • Product Fit: Minor Modifications
  • Quantity Sold: Sold Individually
  • Tube Material: Aluminized Steel
  • Anticipated Ship Out Time: 1-2 Business Days
  • Catalyst Substrate Material: Ceramic honeycomb
  • Dimensions: 6 x 4.25 x 10 in., 14 in. overall length
  • Warranty: 5-year or 50,000-mile Eastern limited warranty
see more Fits the following 2003 Audi A6 Quattro submodels:
  • 8 Cyl 4.2L | Base
Rating: (see review/s)

"Great price and good service so far. Would recommend this product to anyone." posted by: Glen on February 23, 2014 view all 13 reviews

49-state legal Eastern Direct Fit Catalytic Converter

Eastern 49-State Legal Direct Fit Catalytic Converters

  • NANO technology for better converter efficiency
  • Advanced materials design for optimum engine output and catalytic efficiency
  • Complete range of inlet and outlet diameters
Backed by 3 decades of product expertise, Eastern continues to invest in state-of-the-art production equipment to guarantee only the best for their customers - making them ready for the future.

Note:
  • 49-state legal; Not legal in California and other states adopting California Emissions Standards; Not for sale or use in California and other states adopting California Emissions Standards; Cannot be shipped to California and such states
Eastern Catalytic Converter, Eastern ECO II, Driver Side, 49-State Legal - No CA Shipments
$356.82 List Price $421.05 Save $64.23 Availability: In Stock
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  • SKU#: EAST40689
  • Product Fit: Direct Fit
  • Quantity Sold: Assembly
  • Tube Material: Aluminized Steel
  • Anticipated Ship Out Time: 1-2 Business Days
  • Catalyst Substrate Material: Ceramic honeycomb
  • Replaces OE Number: 4B0253011QX, 4B0253011RX
  • Warranty: 5-year or 50,000-mile Eastern limited warranty
see more Fits the following 2003 Audi A6 Quattro submodels:
  • 6 Cyl 3.0L | Avant, Base
Eastern Catalytic Converter, Eastern ECO II, Passenger Side, 49-State Legal - No CA Shipments
$331.50 List Price $391.17 Save $59.67 Availability: In Stock
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  • SKU#: EAST40690
  • Product Fit: Direct Fit
  • Quantity Sold: Assembly
  • Tube Material: Aluminized Steel
  • Anticipated Ship Out Time: 1-2 Business Days
  • Catalyst Substrate Material: Ceramic honeycomb
  • Dimensions: 50.5 in. overall length
  • Replaces OE Number: 4B0253012QX, 4B0253012RX
  • Warranty: 5-year or 50,000-mile Eastern limited warranty
see more Fits the following 2003 Audi A6 Quattro submodels:
  • 6 Cyl 3.0L | Avant, Base
Eastern Catalytic Converter, Eastern ECO III, Driver Side, 49-State Legal - No CA Shipments
$365.02 List Price $430.72 Save $65.70 Availability: In Stock
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  • SKU#: EAST40728
  • Product Fit: Direct Fit
  • Quantity Sold: Assembly
  • Tube Material: Aluminized Steel
  • Anticipated Ship Out Time: 1-2 Business Days
  • Catalyst Substrate Material: Ceramic honeycomb
  • Warranty: 5-year or 50,000-mile Eastern limited warranty
see more Fits the following 2003 Audi A6 Quattro submodels:
  • 8 Cyl 4.2L | Base

Magnaflow 49-State Legal Semi-Universal Catalytic Converter

  • Not legal for use in California or in states adopting the California emissions standards
  • Semi-universal design – cut out your old catalytic converter and weld in the new one
  • Stainless Steel Construction
  • Legendary Magnaflow quality, power, and sound
  • Ceramic, honeycomb catalyst designed for maximum flow and surface area

When you want the best, you want Magnaflow!  These 49-State Legal semi-universal catalytic converters have a catalyst specifically designed for your vehicle – just cut out your old catalytic converter and weld in the new one.  Engineered to cut emissions and improve performance.

Magnaflow Catalytic Converter, Magnaflow 49-State Semi-Universal, Passenger Side, 49-State Legal - No CA Shipments
$97.63 List Price $126.35 Save $28.72 Availability: In Stock
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  • SKU#: M6699204HM
  • Product Fit: Minor Modifications
  • Quantity Sold: Sold Individually
  • Tube Material: Stainless Steel
  • Anticipated Ship Out Time: 1-2 Business Days
  • Catalyst Substrate Material: Ceramic honeycomb
  • Dimensions: 9 in. L x 5.13 in. W, 13 in. overall length
  • EO Number: Not applicable
  • Warranty: Magnaflow 25,000 Mile Limited Warranty
see more Fits the following 2003 Audi A6 Quattro submodels:
  • 8 Cyl 4.2L | Base
Rating: (see review/s)

"Replaced entire exhaust and this item was part of it. Couple days for shipping arrived undamaged had everything welded and installed and sounds great. This is a fraction of the cost of a direct fit/bolt on converter so was pretty much a no-brainer." posted by: on May 18, 2014

Magnaflow Catalytic Converter, Magnaflow 49-State Semi-Universal, Driver Side, 49-State Legal - No CA Shipments
$97.63 List Price $126.35 Save $28.72 Availability: In Stock
  • APW Bestseller
  • Free Ground Shipping
  • Low Price Guarantee
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)
  • SKU#: M6699206HM
  • Product Fit: Minor Modifications
  • Quantity Sold: Sold Individually
  • Tube Material: Stainless Steel
  • Anticipated Ship Out Time: 1-2 Business Days
  • Catalyst Substrate Material: Ceramic honeycomb
  • Dimensions: 9 in. L x 5.13 in. W, 13 in. overall length
  • EO Number: Not applicable
  • Notes: Does not have provision for O2 sensor
  • Warranty: Magnaflow 25,000 Mile Limited Warranty
see more Fits the following 2003 Audi A6 Quattro submodels:
  • 8 Cyl 4.2L | Base
Rating: (see review/s)

"While it is necessary to adapt to pipe size on vehicle, the rear requires leaving part of the previous converter on. i.e. The very end of the old converter. That will be the same OD as the new converrter. The old fitting has to be ground down, or as I did, filed. I might better have used a coupling. When I do the left bank, I may try cutting the old portion off, and adapt down. I shall try the coupling. You must have a local supplier who stocks a wide variety of fittings! They are inexpensive. Remember, the adapters can be shortened to allow slippage while installing. They can always be shortened, but cannot be lengthened once cut off, so measure carefully. Think ahead. Procrastinate. As it is, I am still going to have a friend braze the rear end joint, as it leaks a little. Using a coupling most likely would have avoided the leakage." posted by: suvguy on July 24, 2012

Magnaflow OEM Grade (49-State Legal) Direct Fit Catalytic Converter

  • Not legal for use in California or in states adopting the California emissions standards
  • Designed for vehicles equipped with California emissions but not registered or driven in a state adopting the California emissions standards (see item details for more information)
  • Easy bolt-on Installation with no cutting, welding or bending required
  • Stainless Steel Construction
  • Legendary Magnaflow quality, power, and sound
  • Ceramic, honeycomb catalyst designed for maximum flow and surface area

When you want the best, you want Magnaflow!  These 49-State Legal direct-fit catalytic converters are specifically designed to fit your vehicle with a no-hassle installation – no cutting, welding, or bending required.  Engineered to cut emissions and improve performance.

Magnaflow Catalytic Converter, Magnaflow OEM Grade (49-State) Direct Fit, 49-State Legal - No CA Shipments, Direct Fit
$520.81 List Price $673.99 Save $153.18 Availability: In Stock
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  • SKU#: M6649893
  • Quantity Sold: Assembly
  • Tube Material: Stainless Steel
  • Anticipated Ship Out Time: 1-2 Business Days
  • Catalyst Substrate Material: Ceramic honeycomb
  • EO Number: Not applicable
  • Warranty: Magnaflow 25,000 Mile Limited Warranty
see more Fits the following 2003 Audi A6 Quattro submodels:
  • 6 Cyl 2.7L | Base
Magnaflow Catalytic Converter, Magnaflow OEM Grade (49-State) Direct Fit, Driver Side, 49-State Legal - No CA Shipments
$441.51 List Price $571.36 Save $129.85 Availability: In Stock
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  • Free Ground Shipping
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  • SKU#: M6651437
  • Product Fit: Direct Fit
  • Quantity Sold: Assembly
  • Tube Material: Stainless Steel
  • Anticipated Ship Out Time: 1-2 Business Days
  • EO Number: Not applicable
  • Warranty: Magnaflow 25,000 Mile Limited Warranty
see more Fits the following 2003 Audi A6 Quattro submodels:
  • 6 Cyl 3.0L | Avant, Base
Magnaflow Catalytic Converter, Magnaflow OEM Grade (49-State) Direct Fit, Passenger Side, 49-State Legal - No CA Shipments
$453.07 List Price $586.32 Save $133.25 Availability: In Stock
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  • SKU#: M6651664
  • Product Fit: Direct Fit
  • Quantity Sold: Assembly
  • Tube Material: Stainless Steel
  • Anticipated Ship Out Time: 1-2 Business Days
  • Catalyst Substrate Material: Ceramic honeycomb
  • EO Number: Not applicable
  • Warranty: Magnaflow 25,000 Mile Limited Warranty
see more Fits the following 2003 Audi A6 Quattro submodels:
  • 8 Cyl 4.2L | Base

Magnaflow 49-State Legal Direct Fit Catalytic Converter

  • Not legal for use in California or in states adopting the California emissions standards
  • Easy bolt-on Installation with no cutting, welding or bending required
  • Stainless Steel Construction
  • Legendary Magnaflow quality, power, and sound
  • Ceramic, honeycomb catalyst designed for maximum flow and surface area

When you want the best, you want Magnaflow!  These 49-State Legal direct-fit catalytic converters are specifically designed to fit your vehicle with a no-hassle installation – no cutting, welding, or bending required.  Engineered to cut emissions and improve performance.

Magnaflow Catalytic Converter, Magnaflow 49-State Direct Fit, 49-State Legal - No CA Shipments, Direct Fit
$465.00 List Price $601.77 Save $136.77 Availability: In Stock
  • Free Ground Shipping
  • Low Price Guarantee
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  • SKU#: M6624893
  • Quantity Sold: Assembly
  • Tube Material: Stainless Steel
  • Anticipated Ship Out Time: 1-2 Business Days
  • Catalyst Substrate Material: Ceramic honeycomb
  • EO Number: Not applicable
  • Warranty: Magnaflow 25,000 Mile Limited Warranty
see more Fits the following 2003 Audi A6 Quattro submodels:
  • 6 Cyl 2.7L | Base
Magnaflow Catalytic Converter, Magnaflow 49-State Direct Fit, Driver Side, 49-State Legal - No CA Shipments
$315.57 List Price $408.39 Save $92.82 Availability: In Stock
  • APW Bestseller
  • Free Ground Shipping
  • Low Price Guarantee
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  • SKU#: M6624124
  • Product Fit: Direct Fit
  • Quantity Sold: Assembly
  • Tube Material: Stainless Steel
  • Anticipated Ship Out Time: 1-2 Business Days
  • EO Number: Not applicable
  • Warranty: Magnaflow 25,000 Mile Limited Warranty
see more Fits the following 2003 Audi A6 Quattro submodels:
  • 6 Cyl 3.0L | Avant, Base

More results for 2003 Audi A6 Quattro Catalytic Converter

MAGNAFLOW CALIFORNIA LEGAL SEMI-UNIVERSAL CATALYTIC CONVERTER
  • 50-State/California Legal
  • Semi-universal design – cut out your old catalytic converter and weld in the new one
  • Stainless Steel Construction
  • Legendary Magnaflow quality, power, and sound
  • Ceramic,... (see more)
MAGNAFLOW OEM GRADE (49-STATE LEGAL) SEMI-UNIVERSAL CATALYTIC CONVERTER
  • Not legal for use in California or in states adopting the California emissions standards
  • Designed for vehicles equipped with California emissions but not registered or driven in a state adopting... (see more)
DAVICO 49-STATE LEGAL - NO CA SHIPMENTS CATALYTIC CONVERTER

Davico Catalytic Converter

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CATCO CATALYTIC CONVERTER (49-STATE LEGAL - NO CA SHIPMENTS)

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WALKER CATALYTIC CONVERTER 49-STATE LEGAL

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BENCHMARK 49-STATE LEGAL (NO CA) OE REPLACEMENT CATALYTIC CONVERTER

Benchmark catalytic converters are considered to be the industry's standard replacement catalytic converter. They are the recognized leading catalytic converters in terms of fitment and durability.... (see more)

EMICO 49-STATE LEGAL - NO CA SHIPMENTS OE REPLACEMENT CATALYTIC CONVERTER
Fixing your motor vehicle's engine/exhaust structure would be a lot simpler with Emico OE Replacement Catalytic Converter. Do not simply wait for your car or truck to experience general performance... (see more)