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Shopping for 2007-Cadillac-STS
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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 APCCT497
$514.99
Edit ZIP code
3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 2007 Cadillac STS
Item LocatedUnited States
Quantity2
Installation PositionDriver & Passenger
ColorNatural
Part interchange
642131, 50444, 642132, 50443
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2 Pcs Left & Right Catalytic Converter
A-Premium®
2-PC Catalytic Converter, Driver & Passenger, Fit Federal Emissions, A-Premium APCCT165
$511.99
Edit ZIP code
3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 2007 Cadillac STS
Item LocatedUnited States
Quantity2
Installation PositionDriver & Passenger
ColorNatural
Part interchange
674-931, 12567688, 12607451, 12638982, 16622, 101488, 674-930, 12567687, 
...View more
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Driver Catalytic Converter
A-Premium®
1-PC Catalytic Converter, Left Driver Side, Fit Federal Emissions, A-Premium APCCT496
$303.99
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3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 2007 Cadillac STS
Item LocatedUnited States
Quantity1
Installation PositionLeft Driver Side
ColorNatural
Part interchange
642132, 50443
Show less
Passenger Catalytic Converter
A-Premium®
1-PC Catalytic Converter, Right Passenger Side, Fit Federal Emissions, A-Premium APCCT495
$248.99
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: 2007 Cadillac STS
Item LocatedUnited States
Quantity1
Installation PositionRight Passenger Side
ColorNatural
Part interchange
642131, 50444
Show less
Right Catalytic Converter
A-Premium®
1-PC Catalytic Converter, Right Passenger Side, Fit Federal Emissions, A-Premium APCCT166
$295.99
Edit ZIP code
3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 2007 Cadillac STS
Item LocatedUnited States
Quantity1
Installation PositionRight Passenger Side
ColorNatural
Part interchange
674-930, 12567687, 12607450, 12638981, 101487
Show less
Left Catalytic Converter
A-Premium®
1-PC Catalytic Converter, Left Driver Side, Fit Federal Emissions, A-Premium APCCT167
$295.99
Edit ZIP code
3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 2007 Cadillac STS
Item LocatedUnited States
Quantity1
Installation PositionLeft Driver Side
ColorNatural
Part interchange
674-931, 12567688, 12607451, 12638982, 16622, 101488
Show less
AP Emissions 770105 Catalytic Converter
AP Emissions
AP Emissions 770105 Catalytic Converter
$626.99
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: 2007 Cadillac STS
Item LocatedUnited States
Quantity1
Part interchange
770105
Show less
AP Emissions 642131 Catalytic Converter, Right Passenger Side
AP Emissions
AP Emissions 642131 Catalytic Converter, Right Passenger Side
$517.99
Edit ZIP code
3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 2007 Cadillac STS
Item LocatedUnited States
Quantity1
Installation PositionRight
Part interchange
642131
Show less
Eastern Catalytic 50443 Catalytic Converter, Left Driver Side
Eastern Catalytic
Eastern Catalytic 50443 Catalytic Converter, Left Driver Side
$548.99
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: 2007 Cadillac STS
Item LocatedUnited States
Quantity1
Installation PositionLeft
Part interchange
50443
Show less
Eastern Catalytic 50444 Catalytic Converter, Right Passenger Side
Eastern Catalytic
Eastern Catalytic 50444 Catalytic Converter, Right Passenger Side
$553.99
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: 2007 Cadillac STS
Item LocatedUnited States
Quantity1
Installation PositionRight
Part interchange
50444
Show less
Eastern Catalytic 50465 Catalytic Converter with Integrated Exhaust Manifold, Right Passenger Side
Eastern Catalytic
Eastern Catalytic 50465 Catalytic Converter with Integrated Exhaust Manifold, Right Passenger Side
$497.99
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: 2007 Cadillac STS
Item LocatedUnited States
Quantity1
Installation PositionRight
Part interchange
50465
Show less
Eastern Catalytic 50464 Catalytic Converter with Integrated Exhaust Manifold, Left Driver Side
Eastern Catalytic
Eastern Catalytic 50464 Catalytic Converter with Integrated Exhaust Manifold, Left Driver Side
$504.99
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: 2007 Cadillac STS
Item LocatedUnited States
Quantity1
Installation PositionLeft
Part interchange
50464
Show less
Catalytic Converter - Walker 15034
Walker
Walker 15034 Catalytic Converter, Exhaust
$167.99
Edit ZIP code
3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 2007 Cadillac STS
Item LocatedUnited States
Quantity1
Installation PositionExhaust
Part interchange
15034, SC207, 602507, 6007, 602007, 70430, SC217, 6507
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Catalytic Converter - Walker 15039
Walker
Walker 15039 Catalytic Converter, Exhaust
$150.99
Quantity Less than 4
Edit ZIP code
3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 2007 Cadillac STS
Item LocatedUnited States
Quantity1
Installation PositionExhaust
Part interchange
15039, 602207, 94109, 83167, 6907, 93167, 70330, 94009, 
...View more
Show less
Catalytic Converter - Walker 15104
Walker
Walker 15104 Catalytic Converter, Exhaust
$269.99
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: 2007 Cadillac STS
Item LocatedUnited States
Quantity1
Installation PositionExhaust
Part interchange
15104, 641211, 92624, 82624
Show less
Catalytic Converter - Walker 93252
Walker
Walker 93252 Catalytic Converter, Exhaust
$185.99
Edit ZIP code
3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 2007 Cadillac STS
Item LocatedUnited States
Quantity1
Installation PositionExhaust
Part interchange
93252, 92465, 70217, 99205HM, 92365, 2575r, 79224, 608745, 
...View more
Show less
Catalytic Converter - Right Passenger Side - Walker 84615
Walker
Walker 84615 Catalytic Converter, Right Passenger Side
$417.99
Edit ZIP code
3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 2007 Cadillac STS
Item LocatedUnited States
Quantity1
Installation PositionRight
Part interchange
84615
Show less
Catalytic Converter - Right Passenger Side - Walker 52503
Walker
Walker 52503 Catalytic Converter, Right Passenger Side
$536.99
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: 2007 Cadillac STS
Item LocatedUnited States
Quantity1
Installation PositionRight
Part interchange
52503, 24931, 12622978, 24403, 079-5237, 49885, 642131, 50444, 
...View more
Show less
Catalytic Converter - Left Driver Side - Walker 52502
Walker
Walker 52502 Catalytic Converter, Left Driver Side
$483.99
Edit ZIP code
3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 2007 Cadillac STS
Item LocatedUnited States
Quantity1
Installation PositionLeft
Part interchange
52502, 4618, 642132, 50443, 079-5238, 15288738, 12622977, 24232, 
...View more
Show less

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!