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Shopping for Mercury-Grand Marquis
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Catalytic Converter

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Driver Catalytic Converter
A-Premium®
1-PC Catalytic Converter, Left Driver Side, Fit Federal Emissions, A-Premium APCCT254
$253.99
Quantity Less than 4
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3-year warranty
90 days free return
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Vehicle: Mercury Grand Marquis
Specifications
2 Pcs Left & Right Catalytic Converter
A-Premium®
2-PC Catalytic Converter, Driver & Passenger, Fit Federal Emissions, A-Premium APCCT502
$649.99
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3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Mercury Grand Marquis
Specifications
Passenger Catalytic Converter
A-Premium®
1-PC Catalytic Converter, Right Passenger Side, Fit Federal Emissions, A-Premium APCCT310
$230.99
Quantity Less than 2
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3-year warranty
90 days free return
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Vehicle: Mercury Grand Marquis
Specifications
Driver Catalytic Converter
A-Premium®
1-PC Catalytic Converter, Left Driver Side, Fit Federal Emissions, A-Premium APCCT501
$339.99
Quantity Less than 2
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3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Mercury Grand Marquis
Specifications
2 Pcs Left & Right Catalytic Converter
A-Premium®
2-PC Catalytic Converter, Driver & Passenger, Fit Federal Emissions, A-Premium APCCT253
$442.99
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3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Mercury Grand Marquis
Specifications
Passenger Catalytic Converter
A-Premium®
1-PC Catalytic Converter, Right Passenger Side, Fit Federal Emissions, A-Premium APCCT503
$351.99
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3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Mercury Grand Marquis
Specifications
AP Emissions 608204 Catalytic Converter
AP Emissions
AP Emissions 608204 Catalytic Converter
$165.99
Quantity Less than 2
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3-year warranty
90 days free return
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Vehicle: Mercury Grand Marquis
Specifications
AP Emissions 771468 Catalytic Converter, Left Driver Side
AP Emissions
AP Emissions 771468 Catalytic Converter, Left Driver Side
$712.99
Quantity Less than 2
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3-year warranty
90 days free return
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Vehicle: Mercury Grand Marquis
Specifications
AP Emissions 771469 Catalytic Converter, Right Passenger Side
AP Emissions
AP Emissions 771469 Catalytic Converter, Right Passenger Side
$712.99
Only 1 item left in stock
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3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Mercury Grand Marquis
Specifications
AP Emissions 771447 Catalytic Converter, Right Passenger Side
AP Emissions
AP Emissions 771447 Catalytic Converter, Right Passenger Side
$802.99
Only 1 item left in stock
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3-year warranty
90 days free return
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Vehicle: Mercury Grand Marquis
Specifications
AP Emissions 771104 Catalytic Converter
AP Emissions
AP Emissions 771104 Catalytic Converter
$416.99
Quantity Less than 5
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3-year warranty
90 days free return
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Vehicle: Mercury Grand Marquis
Specifications
AP Emissions 9206 Catalytic Converter
AP Emissions
AP Emissions 9206 Catalytic Converter
$51.99
Only 1 item left in stock
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3-year warranty
90 days free return
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Vehicle: Mercury Grand Marquis
Specifications
AP Emissions 642549 Catalytic Converter, Left Driver Side
AP Emissions
AP Emissions 642549 Catalytic Converter, Left Driver Side
$336.99
Quantity Less than 2
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3-year warranty
90 days free return
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Vehicle: Mercury Grand Marquis
Specifications
AP Emissions 642550 Catalytic Converter, Right Passenger Side
AP Emissions
AP Emissions 642550 Catalytic Converter, Right Passenger Side
$299.99
Quantity Less than 2
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3-year warranty
90 days free return
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Vehicle: Mercury Grand Marquis
Specifications
AP Emissions 642161 Catalytic Converter, Right Passenger Side
AP Emissions
AP Emissions 642161 Catalytic Converter, Right Passenger Side
$285.99
Quantity Less than 4
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3-year warranty
90 days free return
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Vehicle: Mercury Grand Marquis
Specifications
AP Emissions 642179 Catalytic Converter, Left Driver Side
AP Emissions
AP Emissions 642179 Catalytic Converter, Left Driver Side
$276.99
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3-year warranty
90 days free return
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Vehicle: Mercury Grand Marquis
Specifications
AP Emissions 602214 Catalytic Converter
AP Emissions
AP Emissions 602214 Catalytic Converter
$83.99
Quantity Less than 3
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3-year warranty
90 days free return
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Vehicle: Mercury Grand Marquis
Specifications
AP Emissions 602004 Catalytic Converter
AP Emissions
AP Emissions 602004 Catalytic Converter
$96.99
Quantity Less than 3
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3-year warranty
90 days free return
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Vehicle: Mercury Grand Marquis
Specifications
AP Emissions 602204 Catalytic Converter
AP Emissions
AP Emissions 602204 Catalytic Converter
$85.99
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3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Mercury Grand Marquis
Specifications
AP Emissions 771450 Catalytic Converter, Left Driver Side
AP Emissions
AP Emissions 771450 Catalytic Converter, Left Driver Side
$816.99
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3-year warranty
90 days free return
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Vehicle: Mercury Grand Marquis
Specifications
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A catalytic converter, often referred to as a "cat," is an essential component of your engine's exhaust system. This device uses catalysts to transform harmful chemicals in the exhaust gases.

What are the signs of a bad catalytic converter?

  • Check engine light
    The dashboard warning light may illuminate, indicating potential issues.
  • Decreased engine performance
    Noticeable loss of power, acceleration, or overall engine performance.
  • Poor fuel economy
    A significant drop in fuel efficiency can occur as the converter fails.
  • Excessive exhaust emissions
    Increased emissions, including a strong sulfur or rotten egg smell.
  • Rattling noises
    Unusual rattling sounds from the exhaust system, indicating internal damage.
  • Overheating
    The engine may run hotter than normal due to restricted exhaust flow.
  • Failed emissions test
    Inability to pass emissions testing due to high pollution levels.

Shop for aftermarket catalytic converters on A-Premium.com

Premium.com offers a wide range of aftermarket catalytic converters for your vehicle. Refine your search by selecting from various dimensions, inlet types, and tube materials. A-Premium team is dedicated to helping you find a compatible catalytic converter for your car. Every item in our catalog is carefully selected by our team of experts, ensuring they undergo rigorous quality checks to endure the demanding conditions of your exhaust system. Shop now to find the best deal on your new catalytic converter!