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Shopping for 1998-Mercury-Grand Marquis
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Catalytic Converter

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2 Pcs Left & Right Catalytic Converter
A-Premium®
2-PC Catalytic Converter, Driver & Passenger, Fit Federal Emissions, A-Premium APCCT502
$649.99
Edit ZIP code
3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 1998 Mercury Grand Marquis
Item LocatedUnited States
Quantity2
Installation PositionDriver & Passenger
ColorNatural
Part interchange
642549, 30315, 642550, 30316
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Driver Catalytic Converter
A-Premium®
1-PC Catalytic Converter, Left Driver Side, Fit Federal Emissions, A-Premium APCCT501
$339.99
Quantity Less than 2
Edit ZIP code
3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 1998 Mercury Grand Marquis
Item LocatedUnited States
Quantity1
Installation PositionLeft Driver Side
ColorNatural
Part interchange
642549, 30315
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Passenger Catalytic Converter
A-Premium®
1-PC Catalytic Converter, Right Passenger Side, Fit Federal Emissions, A-Premium APCCT503
$351.99
Edit ZIP code
3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 1998 Mercury Grand Marquis
Item LocatedUnited States
Quantity1
Installation PositionRight Passenger Side
ColorNatural
Part interchange
642550
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AP Emissions 608204 Catalytic Converter
AP Emissions
AP Emissions 608204 Catalytic Converter
$165.99
Only 1 item left in stock
Edit ZIP code
3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 1998 Mercury Grand Marquis
Item LocatedUnited States
Quantity1
Part interchange
608204
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AP Emissions 771468 Catalytic Converter, Left Driver Side
AP Emissions
AP Emissions 771468 Catalytic Converter, Left Driver Side
$712.99
Quantity Less than 2
Edit ZIP code
3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 1998 Mercury Grand Marquis
Item LocatedUnited States
Quantity1
Installation PositionLeft
Part interchange
771468
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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
Edit ZIP code
3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 1998 Mercury Grand Marquis
Item LocatedUnited States
Quantity1
Installation PositionRight
Part interchange
771469
Show less
AP Emissions 771104 Catalytic Converter
AP Emissions
AP Emissions 771104 Catalytic Converter
$416.99
Quantity Less than 5
Edit ZIP code
3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 1998 Mercury Grand Marquis
Item LocatedUnited States
Quantity1
Part interchange
771104
Show less
AP Emissions 642549 Catalytic Converter, Left Driver Side
AP Emissions
AP Emissions 642549 Catalytic Converter, Left Driver Side
$336.99
Quantity Less than 2
Edit ZIP code
3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 1998 Mercury Grand Marquis
Item LocatedUnited States
Quantity1
Installation PositionLeft
Part interchange
642549
Show less
AP Emissions 642550 Catalytic Converter, Right Passenger Side
AP Emissions
AP Emissions 642550 Catalytic Converter, Right Passenger Side
$299.99
Quantity Less than 2
Edit ZIP code
3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 1998 Mercury Grand Marquis
Item LocatedUnited States
Quantity1
Installation PositionRight
Part interchange
642550
Show less
AP Emissions 602214 Catalytic Converter
AP Emissions
AP Emissions 602214 Catalytic Converter
$83.99
Quantity Less than 3
Edit ZIP code
3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 1998 Mercury Grand Marquis
Item LocatedUnited States
Quantity1
Part interchange
602214
Show less
AP Emissions 602204 Catalytic Converter
AP Emissions
AP Emissions 602204 Catalytic Converter
$85.99
Edit ZIP code
3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 1998 Mercury Grand Marquis
Item LocatedUnited States
Quantity1
Part interchange
602204
Show less
AP Emissions 9206 Catalytic Converter
AP Emissions
AP Emissions 9206 Catalytic Converter
$51.99
Edit ZIP code
3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 1998 Mercury Grand Marquis
Item LocatedUnited States
Quantity1
Part interchange
9206
Show less
Eastern Catalytic 30316 Catalytic Converter, Right Passenger Side
Eastern Catalytic
Eastern Catalytic 30316 Catalytic Converter, Right Passenger Side
$322.99
Edit ZIP code
3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 1998 Mercury Grand Marquis
Item LocatedUnited States
Quantity1
Installation PositionRight
Part interchange
30316
Show less
Eastern Catalytic 30315 Catalytic Converter, Left Driver Side
Eastern Catalytic
Eastern Catalytic 30315 Catalytic Converter, Left Driver Side
$336.99
Edit ZIP code
3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 1998 Mercury Grand Marquis
Item LocatedUnited States
Quantity1
Installation PositionLeft
Part interchange
30315
Show less
MagnaFlow 441102 Catalytic Converter, Right Passenger Side
MagnaFlow
MagnaFlow 441102 Catalytic Converter, Right Passenger Side
$722.99
Quantity Less than 2
Edit ZIP code
3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 1998 Mercury Grand Marquis
Item LocatedUnited States
Quantity1
Installation PositionRight
Part interchange
441102, F5AZ-5E212-A
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MagnaFlow 441124 Catalytic Converter
MagnaFlow
MagnaFlow 441124 Catalytic Converter
$363.99
Only 1 item left in stock
Edit ZIP code
3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 1998 Mercury Grand Marquis
Item LocatedUnited States
Quantity1
Part interchange
441124
Show less
MagnaFlow 441174 Catalytic Converter
MagnaFlow
MagnaFlow 441174 Catalytic Converter
$350.99
Quantity Less than 2
Edit ZIP code
3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 1998 Mercury Grand Marquis
Item LocatedUnited States
Quantity1
Part interchange
441174
Show less
MagnaFlow 441175 Catalytic Converter
MagnaFlow
MagnaFlow 441175 Catalytic Converter
$350.99
Only 1 item left in stock
Edit ZIP code
3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 1998 Mercury Grand Marquis
Item LocatedUnited States
Quantity1
Part interchange
441175
Show less
MagnaFlow 441405 Catalytic Converter
MagnaFlow
MagnaFlow 441405 Catalytic Converter
$489.99
Quantity Less than 2
Edit ZIP code
3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 1998 Mercury Grand Marquis
Item LocatedUnited States
Quantity1
Part interchange
441405
Show less
MagnaFlow 444021 Catalytic Converter, Left Driver Side
MagnaFlow
MagnaFlow 444021 Catalytic Converter, Left Driver Side
$706.99
Edit ZIP code
3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 1998 Mercury Grand Marquis
Item LocatedUnited States
Quantity1
Installation PositionLeft
Part interchange
444021
Show less
Page 1 of 2

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!