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Catalytic Converter for 2004 Mercury Mountaineer

We have 48 Items In-stock. Select your vehicle's Submodel to continue.

Evan Fischer 48-State Legal (No CA and NY) Catalytic Converter

This Evan Fischer 48-State Legal (No CA and NY) Direct Fit Catalytic Converter is manufactured from high quality and durable stainless steel catalytic case, 16-gauge aluminized steel tubes, and heat shield for long lasting durability and better protection for your vehicle. It also features honeycomb catalyst that has maximum surface area flow. OBD-II and EPA compliant catalytic converter; It is a high quality aftermarket replacement for the OEM catalytic converter. Designed for easy installation - it requires no cutting or welding!

Evan Fischer also offers comprehensive manifold converter assemblies for newer vehicle models!

  • OBD-II And EPA compliant catalytic converter
  • Requires NO cutting or welding
  • Honeycomb catalyst with maximum surface area flow
  • Covered by 5-year or 50,000-mile limited warranty
  • Not legal for sale in California and New York; Cannot be shipped to CA or NY addresses

Evan Fischer Front Catalytic Converter - Traditional Converter, Direct Fit

Best Seller
$341.70 $403.21 You Save $61.51 (15%)
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Availability: In Stock
(more)
  • Sku#: REPF960321
  • Location: Front
  • Type: Traditional Converter
  • Emissions: 48-State Legal (Cannot Ship to CA or NY)
  • Product Fit: Direct Fit
  • Quantity Sold: Assembly
  • Tube Material: Aluminized Steel
  • Dimensions: 55.5 in. overall length
  • Inlet Type: Dual (2-bolt and 3-bolt spinner flange)
  • Outlet Type: Single (2-bolt welded flange)
  • Oxygen Sensor Ports: 4
  • Anticipated Ship Out Time: 1-2 Business Days
  • Warranty: 5-year or 50,000-mile limited warranty
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Fits the following 2004 Mercury Mountaineer Submodels

  • 6 Cyl 4.0L | Base, Premier
See more

Evan Fischer Front Catalytic Converter - Traditional Converter, Direct Fit

Best Seller
$379.92 $448.31 You Save $68.39 (15%)
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Availability: In Stock
(more)
  • Sku#: REPF960324
  • Location: Front
  • Type: Traditional Converter
  • Emissions: 48-State Legal (Cannot Ship to CA or NY)
  • Product Fit: Direct Fit
  • Quantity Sold: Assembly
  • Tube Material: Aluminized Steel
  • Dimensions: 58.5 in. overall length
  • Inlet Type: Dual (2-bolt and 3-bolt spinner flange)
  • Outlet Type: Single (2-bolt welded flange)
  • Oxygen Sensor Ports: 4
  • Anticipated Ship Out Time: 1-2 Business Days
  • Warranty: 5-year or 50,000-mile limited warranty
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Fits the following 2004 Mercury Mountaineer Submodels

  • 8 Cyl 4.6L | Base, Premier
See more

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 ECO II Rear Catalytic Converter - Traditional Converter, Semi-Universal

Best Seller
$66.50 $78.47 You Save $11.97 (15%)
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Availability: In Stock
(more)
  • Sku#: EAST82725
  • Location: Rear
  • Series: Eastern ECO II
  • Type: Traditional Converter
  • Emissions: 48-State Legal (Cannot Ship to CA or NY)
  • Product Fit: Semi-Universal
  • Quantity Sold: Sold Individually
  • Tube Material: Aluminized Steel
  • Dimensions: 6 x 4.25 x 10 in., 14 in. overall length
  • Anticipated Ship Out Time: 1-2 Business Days
  • Warranty: 5-year or 50,000-mile Eastern limited warranty
See more

Fits the following 2004 Mercury Mountaineer Submodels

  • 8 Cyl 4.6L | Base, Premier
See more
Customer Review: (see review/s)
  • found this web site & got a good deal.fast shipping and a great sales person who took my order.

    posted by: on July 30, 2014

  • view all 6 reviews

Eastern ECO II Front Catalytic Converter - Traditional Converter, Semi-Universal

Best Seller
$66.50 $78.47 You Save $11.97 (15%)
Add to Cart
Availability: In Stock
(more)
  • Sku#: EAST82725
  • Location: Front
  • Series: Eastern ECO II
  • Type: Traditional Converter
  • Emissions: 48-State Legal (Cannot Ship to CA or NY)
  • Product Fit: Semi-Universal
  • Quantity Sold: Sold Individually
  • Tube Material: Aluminized Steel
  • Dimensions: 6 x 4.25 x 10 in., 14 in. overall length
  • Anticipated Ship Out Time: 1-2 Business Days
  • Warranty: 5-year or 50,000-mile Eastern limited warranty
See more

Fits the following 2004 Mercury Mountaineer Submodels

  • 6 Cyl 4.0L | Base, Premier
See more
Customer Review: (see review/s)
  • found this web site & got a good deal.fast shipping and a great sales person who took my order.

    posted by: on July 30, 2014

  • view all 6 reviews

Eastern Standard Rear Catalytic Converter - Traditional Converter, Semi-Universal

Best Seller
$65.24 $76.98 You Save $11.74 (15%)
Add to Cart
Availability: In Stock
(more)
  • Sku#: EAST83706
  • Location: Rear
  • Series: Eastern Standard
  • Type: Traditional Converter
  • Emissions: 48-State Legal (Cannot Ship to CA or NY)
  • Product Fit: Semi-Universal
  • Quantity Sold: Sold Individually
  • Tube Material: Aluminized Steel
  • Anticipated Ship Out Time: Same day - 1 business day
  • Warranty: 5-year or 50,000-mile Eastern limited warranty
See more

Fits the following 2004 Mercury Mountaineer Submodels

  • 6 Cyl 4.0L | Base, Premier
See more
Customer Review: (see review/s)
  • It was what I ordered ; it was what I received . It did what it was suppose to do .

    posted by: on March 22, 2015

  • view all 2 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 ECO II Front Catalytic Converter - Traditional Converter, Direct Fit

Best Seller
$449.20 $530.06 You Save $80.86 (15%)
Add to Cart
Availability: In Stock
(more)
  • Sku#: EAST30447
  • Location: Front
  • Series: Eastern ECO II
  • Type: Traditional Converter
  • Emissions: 48-State Legal (Cannot Ship to CA or NY)
  • Product Fit: Direct Fit
  • Quantity Sold: Assembly
  • Tube Material: Aluminized Steel
  • Replaces OE Number: 2L2Z5F250AB, 4L2Z5F250FA
  • Dimensions: 55.5 in. overall length
  • Anticipated Ship Out Time: 1-2 Business Days
  • Warranty: 5-year or 50,000-mile Eastern limited warranty
See more

Fits the following 2004 Mercury Mountaineer Submodels

  • 6 Cyl 4.0L | Base, Premier
See more
Customer Review: (see review/s)
  • great product,price is good,fits good easy to install.

    posted by: jim on September 9, 2009

Eastern ECO II Catalytic Converter - Traditional Converter, Direct Fit

Overstock
$533.73 $629.80 You Save $96.07 (15%)
Add to Cart
Availability: In Stock
(more)
  • Sku#: EAST30454
  • Series: Eastern ECO II
  • Type: Traditional Converter
  • Emissions: 48-State Legal (Cannot Ship to CA or NY)
  • Product Fit: Direct Fit
  • Quantity Sold: Assembly
  • Tube Material: Aluminized Steel
  • Dimensions: 58.5 in. overall length
  • Anticipated Ship Out Time: 1-2 Business Days
  • Warranty: 5-year or 50,000-mile Eastern limited warranty
See more

Fits the following 2004 Mercury Mountaineer Submodels

  • 8 Cyl 4.6L | Base, Premier
See more

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 49-State Semi-Universal Rear Catalytic Converter - Traditional Converter, Semi-Universal

Best Seller
$111.97 $144.90 You Save $32.93 (23%)
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Availability: In Stock
(more)
  • Sku#: M6699006HM
  • Location: Rear
  • Series: Magnaflow 49-State Semi-Universal
  • Type: Traditional Converter
  • Emissions: 48-State Legal (Cannot Ship to CA or NY)
  • Product Fit: Semi-Universal
  • Quantity Sold: Sold Individually
  • Tube Material: Stainless Steel
  • Dimensions: 12 in. L x 6.5 in. W, 16 in. overall length
  • Anticipated Ship Out Time: 1-2 Business Days
  • Warranty: Magnaflow 25,000 Mile Limited Warranty
  • Notes: Slip fit Inlet and outlet attachment type
See more

Fits the following 2004 Mercury Mountaineer Submodels

  • 8 Cyl 4.6L | Base, Premier
See more

Magnaflow 49-State Semi-Universal Front, Driver Or Passenger Side Catalytic Converter - Traditional Converter, Semi-Universal

Best Seller
$100.27 $129.77 You Save $29.50 (23%)
Add to Cart
Availability: In Stock
(more)
  • Sku#: M6699206HM
  • Location: Front, Driver Or Passenger Side
  • Series: Magnaflow 49-State Semi-Universal
  • Type: Traditional Converter
  • Emissions: 48-State Legal (Cannot Ship to CA or NY)
  • Product Fit: Semi-Universal
  • Quantity Sold: Sold Individually
  • Tube Material: Stainless Steel
  • Dimensions: 9 in. L x 5.13 in. W, 13 in. overall length
  • Anticipated Ship Out Time: 1-2 Business Days
  • Warranty: Magnaflow 25,000 Mile Limited Warranty
  • Notes: Does not have provision for O2 sensor
See more

Fits the following 2004 Mercury Mountaineer Submodels

  • 8 Cyl 4.6L | Base, Premier
  • 6 Cyl 4.0L | Base, Premier
See more
Customer Review: (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 49-State Semi-Universal Rear Catalytic Converter - Traditional Converter, Semi-Universal

Overstock
$121.78 $157.60 You Save $35.82 (23%)
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Availability: In Stock
(more)
  • Sku#: M6699036HM
  • Location: Rear
  • Series: Magnaflow 49-State Semi-Universal
  • Type: Traditional Converter
  • Emissions: 48-State Legal (Cannot Ship to CA or NY)
  • Product Fit: Semi-Universal
  • Quantity Sold: Sold Individually
  • Tube Material: Stainless Steel
  • Anticipated Ship Out Time: 1-2 Business Days
  • Warranty: Magnaflow 25,000 Mile Limited Warranty
See more

Fits the following 2004 Mercury Mountaineer Submodels

  • 6 Cyl 4.0L | Base, Premier
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 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 OEM Grade (49-State) Semi-Universal Rear Catalytic Converter - Traditional Converter, Semi-Universal

Best Seller
$136.20 $176.25 You Save $40.05 (23%)
Add to Cart
Availability: In Stock
(more)
  • Sku#: M6651006
  • Location: Rear
  • Series: Magnaflow OEM Grade (49-State) Semi-Universal
  • Type: Traditional Converter
  • Emissions: 48-State Legal (Cannot Ship to CA or NY)
  • Product Fit: Semi-Universal
  • Quantity Sold: Sold Individually
  • Tube Material: Stainless Steel
  • Anticipated Ship Out Time: 1-2 Business Days
  • Warranty: Magnaflow 25,000 Mile Limited Warranty
See more

Fits the following 2004 Mercury Mountaineer Submodels

  • 8 Cyl 4.6L | Base, Premier
See more

Magnaflow OEM Grade (49-State) Semi-Universal Front, Driver Or Passenger Side Catalytic Converter - Traditional Converter, Semi-Universal

Overstock
$122.43 $158.43 You Save $36.00 (23%)
Add to Cart
Availability: In Stock
(more)
  • Sku#: M6651206
  • Location: Front, Driver Or Passenger Side
  • Series: Magnaflow OEM Grade (49-State) Semi-Universal
  • Type: Traditional Converter
  • Emissions: 48-State Legal (Cannot Ship to CA or NY)
  • Product Fit: Semi-Universal
  • Quantity Sold: Sold Individually
  • Tube Material: Stainless Steel
  • Anticipated Ship Out Time: 1-2 Business Days
  • Warranty: Magnaflow 25,000 Mile Limited Warranty
See more

Fits the following 2004 Mercury Mountaineer Submodels

  • 6 Cyl 4.0L | Base, Premier
  • 8 Cyl 4.6L | Base, Premier
See more

Magnaflow OEM Grade (49-State) Semi-Universal Rear Catalytic Converter - Traditional Converter, Semi-Universal

Overstock
$146.00 $188.95 You Save $42.95 (23%)
Add to Cart
Availability: In Stock
(more)
  • Sku#: M6651036
  • Location: Rear
  • Series: Magnaflow OEM Grade (49-State) Semi-Universal
  • Type: Traditional Converter
  • Emissions: 48-State Legal (Cannot Ship to CA or NY)
  • Product Fit: Semi-Universal
  • Quantity Sold: Sold Individually
  • Tube Material: Stainless Steel
  • Anticipated Ship Out Time: 1-2 Business Days
  • Warranty: Magnaflow 25,000 Mile Limited Warranty
See more

Fits the following 2004 Mercury Mountaineer Submodels

  • 6 Cyl 4.0L | Base, Premier
See more

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