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Catalytic Converter

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Eastern Catalytic 40684 Catalytic Converter, Front SideEastern Catalytic 40684 Catalytic Converter, Front Side
Eastern Catalytic
Eastern Catalytic 40684 Catalytic Converter, Front Side
$561.99
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: Audi A4
Item LocatedUnited States
Quantity1
Installation PositionFront
Part interchange
40684
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Eastern Catalytic 40300 Catalytic Converter
Eastern Catalytic
Eastern Catalytic 40300 Catalytic Converter
$601.99
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3-year warranty
90 days free return
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Vehicle: Audi A4
Item LocatedUnited States
Quantity1
Part interchange
40300
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MagnaFlow 5411306 Catalytic Converter
MagnaFlow
MagnaFlow 5411306 Catalytic Converter
$665.99
Quantity Less than 3
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3-year warranty
90 days free return
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Vehicle: Audi A4
Item LocatedUnited States
Quantity1
Part interchange
5411306
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MagnaFlow 418004 Catalytic Converter
MagnaFlow
MagnaFlow 418004 Catalytic Converter
$419.99
Only 1 item left in stock
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3-year warranty
90 days free return
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Vehicle: Audi A4
Item LocatedUnited States
Quantity1
Part interchange
418004
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MagnaFlow 444333 Catalytic Converter, Left Driver Side
MagnaFlow
MagnaFlow 444333 Catalytic Converter, Left Driver Side
$978.99
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3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Audi A4
Item LocatedUnited States
Quantity1
Installation PositionLeft
Part interchange
444333, 4B0253011PX, 4B0253057PX, 4B0254500LX
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Catalytic Converter - Walker 15034
Walker
Walker 15034 Catalytic Converter, Exhaust
$167.99
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3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Audi A4
Item LocatedUnited States
Quantity1
Installation PositionExhaust
Part interchange
15034, SC207, 602507, 6007, 602007, 70430, SC217, 6507
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Catalytic Converter - Walker 15104
Walker
Walker 15104 Catalytic Converter, Exhaust
$269.99
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: Audi A4
Item LocatedUnited States
Quantity1
Installation PositionExhaust
Part interchange
15104, 641211, 92624, 82624
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Catalytic Converter - Walker 93263
Walker
Walker 93263 Catalytic Converter, Exhaust
$168.99
Only 1 item left in stock
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3-year warranty
90 days free return
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Vehicle: Audi A4
Item LocatedUnited States
Quantity1
Installation PositionExhaust
Part interchange
93263, 2506R, 99736, 92736
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Catalytic Converter - Walker 93251
Walker
Walker 93251 Catalytic Converter, Exhaust
$183.99
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3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Audi A4
Item LocatedUnited States
Quantity1
Installation PositionExhaust
Part interchange
93251, 51754, 99656HM, 70216, 70247, 99214, 92154, 51204, 
...View more
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Catalytic Converter - Walker 93271
Walker
Walker 93271 Catalytic Converter, Exhaust
$158.99
Quantity Less than 2
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3-year warranty
90 days free return
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Vehicle: Audi A4
Item LocatedUnited States
Quantity1
Installation PositionExhaust
Part interchange
93271, 608435, 608286, 51655, 99655HM, 78124, 79124, 81255
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Catalytic Converter - Walker 82506
Walker
Walker 82506 Catalytic Converter, Exhaust
$415.99
Quantity Less than 5
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3-year warranty
90 days free return
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Vehicle: Audi A4
Item LocatedUnited States
Quantity1
Installation PositionExhaust
Part interchange
82506
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Catalytic Converter - Walker 81804
Walker
Walker 81804 Catalytic Converter
$303.99
Only 1 item left in stock
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3-year warranty
90 days free return
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Vehicle: Audi A4
Item LocatedUnited States
Quantity1
Part interchange
81804
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Catalytic Converter - Walker 81660
Walker
Walker 81660 Catalytic Converter, Exhaust
$410.99
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: Audi A4
Item LocatedUnited States
Quantity1
Installation PositionExhaust
Part interchange
81660
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Catalytic Converter - Walker 16595
Walker
Walker 16595 Catalytic Converter, Exhaust
$665.99
Quantity Less than 3
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3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Audi A4
Item LocatedUnited States
Quantity1
Installation PositionExhaust
Part interchange
16595, 8K0254253HX, 52397, 8K0254250FX, 644025, 096-1245, 40684, 49078, 
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Catalytic Converter - Walker 16087
Walker
Walker 16087 Catalytic Converter, Exhaust
$530.99
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: Audi A4
Item LocatedUnited States
Quantity1
Installation PositionExhaust
Part interchange
16087, 22960, 4186, 40300, 099-3021, 099-1240, 51644, 642688, 
...View more
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Catalytic Converter - Walker 84304
Walker
Walker 84304 Catalytic Converter, Exhaust
$355.99
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3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Audi A4
Item LocatedUnited States
Quantity1
Installation PositionExhaust
Part interchange
84304
Show less
Page 2 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!