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Catalytic Converter for 2004 Audi A8 Quattro

We have 13 Items In-stock.

Eastern 50-state legal Catalytic Converter

Eastern ECO CARB Catalytic Converter

 30 years of innovation is proof enough that Eastern is the best manufacturer of the finest aftermarket and original equipment catalytic converters on the market. Their ECO Series Catalytic Converters which are designed to help keep the Check Engine Light (MIL) off is another set of catalytic converters with world class quality.

 The Eastern ECO CARB Catalytic Converter is the best option for any vehicle that needs to comply with the California Air Resources Board (CARB) regulations. The Eastern ECO CARB Catalytic Converter features washcoats with greater loadings of precious metals to handle applications with ultra low emissions, higher than normal emissions, as well as vehicles with higher mileage and heavier workloads.

Here's why Eastern ECO CARB Catalytic Converter is the best option:

  •   Passed the emissions requirement of the California Air Resources Board
  •   Engineered with Eastern's proprietary NANO technology yielding highly efficient loadings for lower cost and better converter efficiency
  •   Features an advanced materials design for maximum engine output and performance
  •   Comes with a 5-year or 50,000-mile warranty
Eastern Catalytic Converter, Eastern ECO CARB, Center, 50-State Legal
$186.75 List Price $220.37 Save $33.62 Availability: In Stock
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  • SKU#: EAST630015
  • Product Fit: Minor Modifications
  • Anticipated Ship Out Time: 1-2 Business Days
  • EO Number: D-665-17
  • Warranty: 5-year or 50,000-mile Eastern limited warranty
Fits the following 2004 Audi A8 Quattro submodels:
  • 8 Cyl 4.2L | L

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, Rear, Driver Or 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#: 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 2004 Audi A8 Quattro submodels:
  • 8 Cyl 4.2L | L
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) 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 the California emissions standards (see item details for more information)
  • 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 OEM Grade (49-State) Semi-Universal, Rear, Driver Or Passenger Side, 49-State Legal - No CA Shipments
$119.14 List Price $154.18 Save $35.04 Availability: In Stock
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  • SKU#: M6651206
  • 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
  • EO Number: Not applicable
  • Warranty: Magnaflow 25,000 Mile Limited Warranty
see more Fits the following 2004 Audi A8 Quattro submodels:
  • 8 Cyl 4.2L | L

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, Passenger Side, 49-State Legal - No CA Shipments
$517.80 List Price $670.10 Save $152.30 Availability: In Stock
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  • SKU#: M6651966
  • 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 2004 Audi A8 Quattro submodels:
  • 8 Cyl 4.2L | L
Magnaflow Catalytic Converter, Magnaflow OEM Grade (49-State) Direct Fit, Driver Side, 49-State Legal - No CA Shipments
$472.73 List Price $611.77 Save $139.04 Availability: In Stock
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  • SKU#: M6651452
  • 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 2004 Audi A8 Quattro submodels:
  • 8 Cyl 4.2L | L
Magnaflow Catalytic Converter, Magnaflow OEM Grade (49-State) Direct Fit, Passenger Side, 49-State Legal - No CA Shipments
$513.63 List Price $664.70 Save $151.07 Availability: In Stock
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  • SKU#: M6651890
  • 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 2004 Audi A8 Quattro submodels:
  • 8 Cyl 4.2L | L

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, Driver Side, 49-State Legal - No CA Shipments
$469.02 List Price $606.97 Save $137.95 Availability: In Stock
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  • SKU#: M6624364
  • 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 2004 Audi A8 Quattro submodels:
  • 8 Cyl 4.2L | L
Magnaflow Catalytic Converter, Magnaflow 49-State Direct Fit, Passenger Side, 49-State Legal - No CA Shipments
$456.49 List Price $590.75 Save $134.26 Availability: In Stock
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  • SKU#: M6624075
  • 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 2004 Audi A8 Quattro submodels:
  • 8 Cyl 4.2L | L
Magnaflow Catalytic Converter, Magnaflow 49-State Direct Fit, Driver Side, 49-State Legal - No CA Shipments
$406.09 List Price $525.53 Save $119.44 Availability: In Stock
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  • SKU#: M6624028
  • 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 2004 Audi A8 Quattro submodels:
  • 8 Cyl 4.2L | L

More results for 2004 Audi A8 Quattro Catalytic Converter

MAGNAFLOW CALIFORNIA LEGAL SEMI-UNIVERSAL CATALYTIC CONVERTER
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  • 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)
WALKER 50-STATE LEGAL CATALYTIC CONVERTER

Walker catalytic converters feature OE style design and fit, thicker OE-quality flanges, oxygen sensor fittings, heat-shielded pipe, and structural brace for enhanced strength and... (see more)

BENCHMARK CATALYTIC CONVERTER (50-STATE LEGAL)

Benchmark Catalytic Converters

The Benchmark catalytic converters are known as the leader in making the industry's best catalytic converters. Known to have the quality that you can count on, the... (see more)

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)