1978 Mercury Monarch Catalytic Converters
Keep Your 1978 Mercury Monarch 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 1978 Mercury Monarch looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Catalytic Converters and Catalytic Converter Gaskets. 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.
Competitive Prices and Extensive Inventory
The average price for a 1978 Mercury Monarch Catalytic Converter at Advance Auto Parts is around $281.32, with a range that starts at $5.99 and goes up to $611.99. With 5 options in stock from 3 trusted brands, finding the right fit is easy. Popular picks like "Walker Standard EPA Universal Catalytic Converter 2"" Inlet (ID) 2"" Outlet (ID), 15036", MagnaFlow California Grade Carb Compliant Universal Catalytic Converter, 3322304, and "Walker CalCat CARB Universal Catalytic Converter 2"" Inlet (ID) 2""Outlet (ID), 81326" start at just $92.99 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 Exhaust Mufflers and Exhaust Tips. At Advance Auto Parts, we’re here to help you keep your 1978 Mercury Monarch in peak condition, inside and out.
Find Your Specific 1978 Mercury Monarch Catalytic Converters
Looking for the perfect Catalytic Converter for your 1978 Mercury Monarch? You’re in the right place. Below, you’ll find links to various types of Catalytic Converters that fit your vehicle. At Advance Auto Parts, we offer only the highest quality OEM and aftermarket Catalytic Converters, ensuring durability and a precise fit for your Mercury Monarch. Whether you’re driving a 1978 model or another popular model year like
1975,
1976,
1977,
1979, and
1980, we’ve got you covered. Purchasing Catalytic Converters from Advance Auto Parts is a smart choice, giving you access to trusted brands and parts built to perform. Below, you’ll find links to various types of Catalytic Converters that fit your vehicle.
Essential 1978 Mercury Monarch Catalytic Converters
Victor Reinz – Victor Reinz Catalytic Converter Gasket, 71-13607-00 (Part No.71-13607-00)
from
$5.99
With Victor Reinz gaskets, you can be sure you are getting sealing solutions that deliver OE quality gasket technology and engineering. That is because Victor Reinz is an original equipment supplier and the trusted choice of manufacturers the world over, offering broad coverage for foreign and domestic cars and trucks. In Victor Reinz gasket sets, you get the right combination of components needed for fast, long-lasting repairs.
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Walker – "Walker CalCat CARB Universal Catalytic Converter 2"" Inlet (ID) 2""Outlet (ID), 81326" (Part No.81326)
from
$427.99
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. Walker CalCat catalytic converters are thoroughly tested to ensure they meet CARB performance requirements.
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Walker – "Walker CalCat CARB Universal Catalytic Converter 2.25"" Inlet (ID) 2.25"" Outlet (ID), 80257" (Part No.80257)
from
$475.99
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. Walker CalCat catalytic converters are thoroughly tested to ensure they meet CARB performance requirements.
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Walker – "Walker CalCat CARB Universal Catalytic Converter 2.25"" Inlet (ID) 2.25"" Outlet (ID), 81127" (Part No.81127)
from
$511.99
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. Walker CalCat catalytic converters are thoroughly tested to ensure they meet CARB performance requirements.
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MagnaFlow – MagnaFlow California Grade Carb Compliant Universal Catalytic Converter, 337305 (Part No.337305)
from
$358.99
Keep the check engine light off with MagnaFlow California Grade CARB Compliant Universal Catalytic Converter 337305. 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.
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MagnaFlow – MagnaFlow California Grade Carb Compliant Universal Catalytic Converter, 338005 (Part No.338005)
from
$301.99
Keep the check engine light off with MagnaFlow California Grade CARB Compliant Universal Catalytic Converter 338005. 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.
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MagnaFlow – MagnaFlow California Grade Carb Compliant Universal Catalytic Converter, 337304 (Part No.337304)
from
$316.99
Keep the check engine light off with MagnaFlow California Grade CARB Compliant Universal Catalytic Converter 337304. 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.
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Walker – "Walker CalCat CARB Universal Catalytic Converter 2.25"" Inlet (ID) 2.25""Outlet (ID), 81327" (Part No.81327)
from
$437.99
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. Walker CalCat catalytic converters are thoroughly tested to ensure they meet CARB performance requirements.
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Walker – "Walker Standard EPA Universal Catalytic Converter 2"" Inlet (ID) 2"" Outlet (ID), 15036" (Part No.15036)
from
$92.99
Designed to provide the required reduction in tailpipe emissions and meet EPA emissions requirements with assured compliance, Walker universal catalytic converters are available for pre-OBDII (1995 and older) vehicles. Count on Walker�catalytic�converters�for�industry-leading fit and performance.
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MagnaFlow – MagnaFlow California Grade Carb Compliant Universal Catalytic Converter, 3322304 (Part No.3322304)
from
$611.99
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.
See More
Walker – "Walker Standard EPA Universal Catalytic Converter 2.25"" Inlet (ID) 2.25"" Outlet (ID), 15037" (Part No.15037)
from
$122.99
Designed to provide the required reduction in tailpipe emissions and meet EPA emissions requirements with assured compliance, Walker universal catalytic converters are available for pre-OBDII (1995 and older) vehicles. Count on Walker�catalytic�converters�for�industry-leading fit and performance.
See More
MagnaFlow – MagnaFlow Standard Grade Federal / Epa Compliant Universal Catalytic Converter, 93515 (Part No.93515)
from
$179.99
Keep the check engine light off with MagnaFlow Standard Grade Federal/EPA Compliant Universal Catalytic Converter 93515. Get the right fit for a wide array of vehicles thanks to the adaptable Universal design. With highly corrosion resistant, stainless steel construction, you can have confidence in the quality of this catalytic converter. This replacement part is designed to meet or exceed Federal emissions requirements set forth by the EPA, complying with legal standards for pre-OBDII Federally registered vehicles.
See More
MagnaFlow – MagnaFlow California Grade Carb Compliant Universal Catalytic Converter, 338004 (Part No.338004)
from
$282.99
Keep the check engine light off with MagnaFlow California Grade CARB Compliant Universal Catalytic Converter 338004. 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.
See More
MagnaFlow – MagnaFlow Standard Grade Federal / Epa Compliant Universal Catalytic Converter, 94004 (Part No.94004)
from
$129.99
Keep the check engine light off with MagnaFlow Standard Grade Federal/EPA Compliant Universal Catalytic Converter 94004. Get the right fit for a wide array of vehicles thanks to the adaptable Universal design. With highly corrosion resistant, stainless steel construction, you can have confidence in the quality of this catalytic converter. This replacement part is designed to meet or exceed Federal emissions requirements set forth by the EPA, complying with legal standards for pre-OBDII Federally registered vehicles.
See More
MagnaFlow – MagnaFlow Standard Grade Federal / Epa Compliant Universal Catalytic Converter, 50004 (Part No.50004)
from
$171.99
Keep the check engine light off with MagnaFlow Standard Grade Federal/EPA Compliant Universal Catalytic Converter 50004. Get the right fit for a wide array of vehicles thanks to the adaptable Universal design. With highly corrosion resistant, stainless steel construction, you can have confidence in the quality of this catalytic converter. This replacement part is designed to meet or exceed Federal emissions requirements set forth by the EPA, complying with legal standards for pre-OBDII Federally registered vehicles.
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Popular 1978 Mercury Monarch Catalytic Converters Categories
Most Popular Catalytic Converters for 1978 Mercury Monarches
Enhance your 1978 Mercury Monarch with one of the 4 Catalytic Converters we have in stock, starting at just $92.99.
MagnaFlow – MagnaFlow Standard Grade Federal / Epa Compliant Universal Catalytic Converter, 94004 (Part No.94004)
from
$129.99
Keep the check engine light off with MagnaFlow Standard Grade Federal/EPA Compliant Universal Catalytic Converter 94004. Get the right fit for a wide array of vehicles thanks to the adaptable Universal design. With highly corrosion resistant, stainless steel construction, you can have confidence in the quality of this catalytic converter. This replacement part is designed to meet or exceed Federal emissions requirements set forth by the EPA, complying with legal standards for pre-OBDII Federally registered vehicles.
See More
Walker – "Walker Standard EPA Universal Catalytic Converter 2"" Inlet (ID) 2"" Outlet (ID), 15036" (Part No.15036)
from
$92.99
Designed to provide the required reduction in tailpipe emissions and meet EPA emissions requirements with assured compliance, Walker universal catalytic converters are available for pre-OBDII (1995 and older) vehicles. Count on Walker�catalytic�converters�for�industry-leading fit and performance.
See More
MagnaFlow – MagnaFlow California Grade Carb Compliant Universal Catalytic Converter, 3322304 (Part No.3322304)
from
$611.99
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.
See More
Walker – "Walker CalCat CARB Universal Catalytic Converter 2"" Inlet (ID) 2""Outlet (ID), 81326" (Part No.81326)
from
$427.99
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. Walker CalCat catalytic converters are thoroughly tested to ensure they meet CARB performance requirements.
See More
Best-Selling 1978 Mercury Monarch Catalytic Converter Gasket
Upgrade your Monarch with our best-selling Catalytic Converter Gasket.
Victor Reinz – Victor Reinz Catalytic Converter Gasket, 71-13607-00 (Part No.71-13607-00)
from
$5.99
With Victor Reinz gaskets, you can be sure you are getting sealing solutions that deliver OE quality gasket technology and engineering. That is because Victor Reinz is an original equipment supplier and the trusted choice of manufacturers the world over, offering broad coverage for foreign and domestic cars and trucks. In Victor Reinz gasket sets, you get the right combination of components needed for fast, long-lasting repairs.
See More
FAQs for 1978 Mercury Monarch Catalytic Converters
What are the best-selling Catalytic Converters for 1978 Mercury Monarches?
Out of 5 Catalytic Converters that fit 1978 Mercury Monarches, the following parts are the top sellers:
- "Walker Standard EPA Universal Catalytic Converter 2"" Inlet (ID) 2"" Outlet (ID), 15036" (5382661) – $92.99
- MagnaFlow California Grade Carb Compliant Universal Catalytic Converter, 3322304 (50260691) – $611.99
- "Walker CalCat CARB Universal Catalytic Converter 2"" Inlet (ID) 2""Outlet (ID), 81326" (50173953) – $427.99
What’s the price range for 1978 Mercury Monarch Catalytic Converters?
The prices of Catalytic Converters for the 1978 Mercury Monarch range from $5.99 up to $611.99 for the most premium parts.
What is the average price of a Catalytic Converter for a 1978 Mercury Monarch?
The average price for Catalytic Converters for the 1978 Mercury Monarch is $281.32. 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 Mercury Monarch model years?
What are the cheapest Catalytic Converters for my 1978 Mercury Monarch?
The cheapest 1978 Mercury Monarch Catalytic Converters we carry are:
- Victor Reinz Catalytic Converter Gasket, 71-13607-00 (50312074) – $5.99
- "Walker Standard EPA Universal Catalytic Converter 2"" Inlet (ID) 2"" Outlet (ID), 15036" (5382661) – $92.99
- MagnaFlow Standard Grade Federal / Epa Compliant Universal Catalytic Converter, 94004 (16120080) – $129.99
- "Walker CalCat CARB Universal Catalytic Converter 2"" Inlet (ID) 2""Outlet (ID), 81326" (50173953) – $427.99
- MagnaFlow California Grade Carb Compliant Universal Catalytic Converter, 3322304 (50260691) – $611.99
Does Advance Auto Parts sell Catalytic Converters for any other 1978 Mercury models?
Yes. We stock Catalytic Converters for 4 other popular 1978 Mercury models. Some of the most popular are 1978 Cougar Catalytic Converters, 1978 Zephyr Catalytic Converters, 1978 Marquis Catalytic Converters, 1978 Bobcat Catalytic Converters, and 1978 Grand Marquis Catalytic Converters.
What are the top-rated Catalytic Converters that fit the 1978 Mercury Monarch?
The one 1978 Mercury Monarch Catalytic Converter we have in stock is the Victor Reinz Catalytic Converter Gasket, 71-13607-00. It costs $5.99.
What types of Catalytic Converters do you sell for my 1978 Mercury Monarch?
As of 8/2/26, these are some of the most in-demand types of Catalytic Converters for a 1978 Mercury Monarch:
Can I get help with 1978 Mercury Monarch Catalytic Converter orders?
Contact our customer support team by chat or phone, through the help desk page, where you can find instant answers about Mercury Catalytic Converters and more.
What is your return policy for Mercury Monarch Catalytic Converters?
Advance Auto Parts keeps returns simple. For new Mercury Monarch Catalytic Converters and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.