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Cadillac STS Catalytic Converters
This page brings together catalytic converters for the Cadillac STS across the 2005–2011 model years, covering direct-fit replacements, universal units, manifold converters, and OE-style options. Pick your Cadillac STS's year above to narrow the list to catalytic converters with confirmed fitment. Every part shown is checked against our vehicle data.
1 - 10 of 10 results
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Magnaflow 51205 Universal Catalytic Converter Inlet/Outlet OEM Grade EPA Compliant - 2.25
Part: 51205
Vehicle Specific
$194.00
In Stock (10+)
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In Stock (10+)
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Magnaflow 99204HM Universal Catalytic Converter 2.00 Inch Inlet/Outlet
Part: 99204HM
Vehicle Specific
$178.00
1 left at this price
MagnaFlow 23045 Direct-Fit Catalytic Converter EPA Compliant Stainless Steel
Part: 23045
Vehicle Specific
$821.29
Ships from manufacturer
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In Stock (10+)
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Magnaflow 5461205 Universal Catalytic Converter 2.25 Inch Inlet Outlet
Part: 5461205
Vehicle Specific
$1,137.00
In Stock (10+)
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MagnaFlow 5411770 California Grade CARB Compliant Direct-Fit Catalytic Converter
Part: 5411770
Vehicle Specific
$1,278.00
Ships from manufacturer
What's here for your Cadillac STS
- Direct-fit catalytic converters designed to match original mounting points and dimensions
- Universal catalytic converters for flexible installation applications
- Manifold-style catalytic converters that integrate close to the exhaust ports
- OE replacement catalytic converters built to factory specifications
The widest selection of catalytic converters for the Cadillac STS here comes from Magnaflow, AP Exhaust, Walker Exhaust, and Catco. Other categories Cadillac STS owners shop for: Cadillac STS Shocks and Struts, Cadillac STS Valve Train Parts and Cadillac STS Tires, or browse all Cadillac STS parts and accessories.