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Mercury Marquis Catalytic Converter

We have 5 Items In-stock. Select a year to continue.
$51.80 List Price $61.12 Save $9.32 Availability: In Stock
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EASTERN CATALYTIC CONVERTER

Eastern catalytic converters are constructed using Eastern's proprietary NANO technology chemistry that yields highly efficient loadings for lower cost and better converter efficiency. It features high flow design that maximizes engine output and catalytic efficiency.

Specifications
  • 3-way catalyst style
  • 6,000 lb GVW
  • Without air tube provision and oxygen sensor port
  • Oval body
  • 6 x 4.25 x 10 in. body, 14 in. overall length
  • 2.25 in. inlet diameter
  • 2.25 in. outlet diameter
  • Single inlet and outlet configuration
  • Non-directional and can be installed either way
  • Modification of the exhaust is required
Note: Not legal for sale in California and New York; Cannot be shipped to CA or NY addresses.

  • SKU#: EAST70317
  • Brand: Eastern
  • Product Fit: Minor Modifications
  • Quantity Sold: 1 piece
  • Tube Material: Aluminized steel
  • Anticipated Ship Out Time: 1-2 business days
  • Catalyst Substrate Material: Ceramic honeycomb
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Fits the following Mercury Marquis Years:
  • 1984-1986 | 6 Cyl 3.8L | Base, Brougham
Rating: (see review/s)

"Getting the vehicle to pass smog was easy after having the catalytic converter installed. The hardest part of this whole repair was finding a shop to do the installation. A few calls and a trip across town and the install was completed in one day. No additional parts were needed and that was good on the budget." posted by: sidekick on January 30, 2014

"came in orginal box with no packing. no instrustions on which side should be installed up. only shielded on one side." posted by: fixit on March 30, 2013 view all 12 reviews

$75.88 List Price $98.20 Save $22.32 Availability: In Stock
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MAGNAFLOW 49-STATE 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.

  • SKU#: M6694004
  • Brand: Magnaflow
  • Product Fit: Minor Modifications
  • Quantity Sold: Sold Individually
  • Tube Material: Stainless steel
  • EO Number: Not applicable
  • Anticipated Ship Out Time: 1-2 business days
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Fits the following Mercury Marquis Years:
  • 1983 | 4 Cyl 2.3L | Base, Brougham
  • 1979-1980 | 8 Cyl 5.0L | Base, Brougham
Rating: (see review/s)

"Had it installed quick and easy at the shop. It is a universal converter so it doesnt come with mounting flanges no universal does. You have to take it to a professional as there is cutting and welding involved to fit but thats what makes a universal cheaper. If you want a more do it yourself then get a direct fit converter. I went universal for the savings and it does the job just fine." posted by: Kyle on August 10, 2012

"The 'minor modifications might be required' in the description of this item cost me an additional sixty dollars in labor and parts by a muffler shop. Had I walked away from the shop to call or write to Autopartswharehouse, my engine would have still been in peril due to further delay. 'Performance' is not rated. It takes time to determine a part's performance. How long it lasts counts." posted by: Lengo on May 30, 2012

$244.83 List Price $524.14 Save $279.31 Availability: In Stock
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CATCO CATALYTIC CONVERTER ASSEMBLY

Catco's catalytic converters are designed with 409 stainless steel pipes and shell for longer life.

Specifications
  • 2-bolt flange inlet
  • 2-bolt flange welded outlet
  • Standard assembly with two catalytic converters
  • Oval body
  • 21 in. overall length
  • 2 in. inlet diameter
  • 2 in. outlet diameter
  • Single inlet and outlet configuration
Not legal for sale in California and New York; Cannot be shipped to CA or NY addresses.

  • SKU#: CAT1007
  • Brand: Catco
  • Quantity Sold: Assembly
  • Tube Material: Stainless steel
  • Anticipated Ship Out Time: 1-2 business days
  • Catalyst Substrate Material: Ceramic honeycomb
  • Dimensions: 21 in. overall length
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Fits the following Mercury Marquis Years:
  • 1984-1986 | 6 Cyl 3.8L | Base, Brougham
$483.21 List Price $1,615.00 Save $1,131.79 Availability: In Stock
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BENCHMARK CATALYTIC CONVERTER ASSEMBLY

Benchmark catalytic converters are considered to be the industry's standard replacement catalytic converter. It is the recognized leader in fitment and durability. It features perfect fit and repeatability and its performance results are continually monitored by Benchmark's internal emissions laboratory to insure quality loadings which eliminate OBDII issues caused by many universal catalysts.

Specifications
  • With oxygen sensor port
  • Standard assembly with two catalytic converters
Not legal for sale in California and New York; Cannot be shipped to CA or NY addresses.

  • SKU#: BEN20446
  • Brand: Benchmark
  • Tube Material: Steel
  • Anticipated Ship Out Time: 1-2 business days
  • Warranty: 5-year or 50,000-mile Benchmark limited warranty
 
Fits the following Mercury Marquis Years:
  • 1983-1986 | 6 Cyl 3.8L | Base, Brougham
$65.32 List Price $203.72 Save $138.40 Availability: In Stock
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WALKER CATALYTIC CONVERTER

Walker catalytic converter features stainless steel body, aluminized expandable bushings and heat shield for enhanced strength and durability.

Specifications
  • Higher loaded substrate
  • Round body
  • 2.25 in. inlet diameter
  • 2.25 in. outlet diameter
  • Single inlet and outlet configuration
  • Modification of the exhaust is required
  • Has broad application coverage
Note: Not legal for sale in California and New York; Cannot be shipped to CA or NY addresses.

  • SKU#: WK15052
  • Brand: Walker
  • Tube Material: Stainless steel
  • Anticipated Ship Out Time: Same day - 1 business day
  • Warranty: 5-year or 50,000-mile Walker limited warranty
 
Fits the following Mercury Marquis Years:
  • 1978 | 8 Cyl 5.8L | Base, Brougham