2003 Chevrolet Impala Catalytic Converters
Keep Your 2003 Chevrolet Impala in Top Shape with Quality Catalytic Converters
Whether you’re repairing or upgrading your Catalytic Converter, using high-quality parts is key to keeping your 2003 Chevrolet Impala looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Catalytic Converter Gaskets and Catalytic Converters. Whether you’re replacing a damaged part or enhancing your truck’s style and protection, you’ll find exactly what you need to get the job done right.
Top-Rated Catalytic Converters from Trusted Brands
Looking for a reliable Catalytic Converter? We’ve got you covered with options from brands you know and trust like Walker and MagnaFlow. For example, Walker Catalytic Converters start at just $8.99 with an average 4.2 star rating. MagnaFlow offer similar pricing and quality, backed by strong customer feedback. With over 137 reviews and a solid 4 star average, you can shop with confidence knowing other Chevrolet Impala owners approve.
Competitive Prices and Extensive Inventory
The average price for a 2003 Chevrolet Impala Catalytic Converter at Advance Auto Parts is around $369.23, with a range that starts at $5.79 and goes up to $1,310.00. With 16 options in stock from 3 trusted brands, finding the right fit is easy. Popular picks like Exhaust Pipe Flange Gasket, Exhaust Pipe Flange Gasket, and EPA Ultra-Boxed Direct Fit Converter start at just $8.99 and offer a great balance of form and function.
Explore Related Parts
While you’re upgrading or replacing your Catalytic Converter, don’t forget to check out other key components like Exhaust Manifold and Headers and Exhaust Mufflers. At Advance Auto Parts, we’re here to help you keep your 2003 Chevrolet Impala in peak condition, inside and out.
Find Your Specific 2003 Chevrolet Impala Catalytic Converters
Looking for the perfect Catalytic Converter for your 2003 Chevrolet Impala? You’re in the right place. Below, you’ll find links to various types of Catalytic Converters that fit your vehicle. At Advance Auto Parts, we offer only the highest quality OEM and aftermarket Catalytic Converters, ensuring durability and a precise fit for your Chevrolet Impala. Whether you’re driving a 2003 model or another popular model year like
2012,
2013,
2014,
2015,
2016,
2017,
2018,
2019, and
2020, we’ve got you covered. Purchasing Catalytic Converters from Advance Auto Parts is a smart choice, giving you access to trusted brands and parts built to perform. Below, you’ll find links to various types of Catalytic Converters that fit your vehicle.
Essential 2003 Chevrolet Impala Catalytic Converters
Walker – CalCat CARB Universal Catalytic Converter 2.5" Inlet (ID) 2.5" Outlet (ID) (Part No.82617)
from
$723.99
Designed, tested and validated for assured compliance to meet CARB standards, Walker CalCat universal catalytic converters are available for OBDII (1996 and newer) and non-OBD (1995 and older) vehicles. Walker CalCat catalytic converters are thoroughly tested to ensure they meet CARB performance requirements.
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MagnaFlow – California Grade Carb Compliant Universal Catalytic Converter (Part No.456206)
from
$931.99
Keep the check engine light off with MagnaFlow California Grade CARB Compliant Universal Catalytic Converter 456206. The Universal design allows the part to fit a wide array of vehicles, and the stainless steel construction of this catalytic converter is highly resistant to corrosion. The single laser fusion weld greatly reduces the possibility of a leak, and our compact, low-mass design also allows for greater thermal efficiency. This replacement part is designed to meet or exceed California Air Resource Board requirements, and has undergone additional testing to comply with CARB guidelines to allow for legal use in California and CARB restricted states, for the listed vehicles.
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MagnaFlow – Oem Grade Federal / Epa Compliant Direct-Fit Catalytic Converter (Part No.52594)
from
$616.99
Keep the check engine light off with MagnaFlow OEM Grade Federal/EPA Compliant Direct-Fit Catalytic Converter 52594. With features including free-flowing mandrel-bent tubing and highly corrosion resistant stainless steel construction, easily install this converter yourself using the proper tools, no cutting or welding required. MagnaFlow’s state-of-the-art metrology department uses the latest 3D scanning systems during research and development, so you can be confident that your new part will fit and function like the original equipment. By replicating the OE design, the single laser fusion weld greatly reduces the possibility of a leak, and our compact, low-mass design also allows for greater thermal efficiency. MagnaFlow 52594 includes (2) Nuts, (2) Bolts, (2) Flat Washers and interchanges with OE parts 20926628, 20965398, 22737796, 22737797. This replacement part is designed to meet or exceed Federal emissions requirements set forth by the EPA, complying with legal standards for OBDII Federally registered vehicles with California or Federal/EPA Emission systems.
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- Durable 308 stainless steel MIG welds
- Simplifies installation with essential gaskets and hardware being included in the box
- Expertly crafted to replicate OEM-like flow dynamics, maintaining factory performance and fuel efficiency
- High strength 16 gauge 409 stainless steel tubing for exceptional corrosion resistance and maximum service life
- OE-sized barbed exhaust hangers made from corrosion-resistant 410 stainless steel, designed to reduce noise and vibration
- Mandrel bent tubing retains OEM-like design and geometry, ensuring smooth exhaust flow for peak fuel economy and engine operation
- Your trusted source for EPA-compliant catalytic converters, providing assurance of genuine compliance while delivering quality that will last
Walker – EPA Ultra-Boxed Direct Fit Converter (Part No.16536)
from
$399.99
Walker Ultra Direct-Fit Catalytic Converters, an industry leader for import And domestic applications, are engineered with durable stainless steel bodies. Walker Ultra Catalytic Converters are available for OBDII (1996 And newer) vehicles. Engineered for specific vehicle emissions requirements, And features a higher loading of precious metals, optimal substrate content, And a high technology washcoat to provide unsurpassed performance, And durability. Walker Ultra Catalytic Converters meet EPA emission requirements, And have a 25,000-mile catalytic performance warranty, in addition to a 5-year/50,000-mile structural integrity warranty.
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Product Features:
- EPA COMPLIANT — For use on OBDII vehicles, 1996 and newer. Not legal for sale or use in CA, CO or NY. Legal inME on EPA Federal Emission Equipped Vehicles only. Consult your state’s aftermarket converter regulations for details.
- Flange to flange, direct fit design bolts to existing exhaust
- Features ample precious metal load & proprietary wash coat technology
- Stainless steel body with aluminized pipe and heat shields for durability
- Thick OE-style flanges, hangers and brackets for enhanced strength
- OE-style routing and hanger position for easy installation
- Meets EPA emissions requirements
- Not legal for sale in California
Walker – Standard EPA Universal Catalytic Converter 2.25" Inlet (ID) 2.25" Outlet (ID) (Part No.15037)
from
$111.99
Designed to provide the required reduction in tailpipe emissions and meet EPA emissions requirements with assured compliance, Walker universal catalytic converters are available for pre-OBDII (1995 and older) vehicles. Count on Walker┬┐catalytic┬┐converters┬┐for┬┐industry-leading fit and performance.
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- EPA COMPLIANT — For use on pre-OBDII vehicles, 1995 and older. Not legal for sale or use in CA, CO and NY. Legal in ME on all pre-OBD vehicles only. Consult your state’s aftermarket converter regulations for details.
- NO BREAK IN REQUIRED — Ready to operate with application-specific converter shell design and mat compression, no converter break in required after installation
- DURABLE — Features stainless-steel body with aluminized pipe and heat shields for durability
- FLEXIBLE SOLUTION — Customizable design features expandable bushings for easy fitment and may require specialized fabrication and/or welding for installation
- OE-STYLE DESIGN — Features aluminized heat shields when originally equipped, to match OE design, protecting the undercarriage from heat created by the converter
- BUY WITH CONFIDENCE — Backed by Walker’s 25,000-mile/40,000-kilometer emissions and 5-year 50,000-mile/80,000-kilometer structural integrity warranty. Visit Walkerexhaust.com for details.
Walker – CalCat CARB Universal Catalytic Converter 2.25" Inlet (ID) 2.25" Outlet (ID) (Part No.84406)
from
$347.99
Designed, tested and validated for assured compliance to meet CARB standards, Walker CalCat universal catalytic converters are available for OBDII (1996 and newer) and non-OBD (1995 and older) vehicles. Walker CalCat catalytic converters are thoroughly tested to ensure they meet CARB performance requirements.
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MagnaFlow – California Grade Carb Compliant Direct-Fit Catalytic Converter (Part No.4481184)
from
$1366.00
Keep the check engine light off with MagnaFlow California Grade CARB Compliant Direct-Fit Catalytic Converter 4481184. With features including free-flowing mandrel-bent tubing and highly corrosion resistant stainless steel construction, easily install this converter yourself using the proper tools, no cutting or welding required. MagnaFlow’s state-of-the-art metrology department uses the latest 3D scanning systems during research and development, so you can be confident that your new part will fit and function like the original equipment. By replicating the OE design, the single laser fusion weld greatly reduces the possibility of a leak, and our compact, low-mass design also allows for greater thermal efficiency. MagnaFlow 4481184 includes (1) O2 Port Plug, (1) Flange Gasket. This replacement part is designed to meet or exceed California Air Resource Board requirements, and has undergone additional testing to comply with CARB guidelines to allow for legal use in California and CARB restricted states, for the listed vehicles.
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Walker – Ultra EPA Direct Fit Catalytic Converter (Part No.16896)
from
$575.99
Designed to comply with EPA standards while delivering premium performance with assured compliance, Walker Ultra direct-fit catalytic converters are available for import and domestic OBDII (1996 and newer) vehicles. Count on Walker Ultra converters for industry-leading fit and function.
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Walker – Ultra EPA Direct Fit Catalytic Converter 2.5" Outlet (OD) (Part No.54962)
from
$1373.99
Designed to comply with EPA standards while delivering premium performance with assured compliance, Walker Ultra direct-fit catalytic converters are available for import and domestic OBDII (1996 and newer) vehicles. Count on Walker Ultra converters for industry-leading fit and function.
Product Features:
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Product Features:
- EPA COMPLIANT — For use on OBDII vehicles, 1996 and newer. Not legal for sale or use in CA, CO & NY. Legal in ME on EPA Federal Emission Equipped Vehicles only. Consult your state’s aftermarket converter regulations for details.
- DIRECT-FIT DESIGN — Direct-fit bolt-on replacement solution with OE-style hangers, brackets, routings and heat shields for easy installation that doesn’t require specialized fabrication and/or welding
- KEEPS CHECK ENGINE LIGHT OFF FOR EMISSIONS CODES — OE-style high-technology washcoat and optimal precious metal load delivers required reduction in tailpipe emissions to match vehicle application
- STRONG AND DURABLE — Features thick OE-style flanges, hangers and brackets for strength and durability
- OE-STYLE DESIGN — Features aluminized heat shields when originally equipped, to match OE design, protecting the undercarriage from heat created by the converter
- BUY WITH CONFIDENCE — Backed by Walker’s 25,000-mile/40,000-kilometer emissions and 5-year 50,000-mile/80,000-kilometer structural integrity warranty. Visit Walkerexhaust.com for details.
Walker – Standard EPA Universal Catalytic Converter 2.25" Inlet (ID) 2.25" Outlet (ID) (Part No.15041)
from
$215.99
Designed to provide the required reduction in tailpipe emissions and meet EPA emissions requirements with assured compliance, Walker universal catalytic converters are available for pre-OBDII (1995 and older) vehicles. Count on Walker┬┐catalytic┬┐converters┬┐for┬┐industry-leading fit and performance.
Product Features:
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Product Features:
- EPA COMPLIANT — For use on pre-OBDII vehicles, 1995 and older. Not legal for sale or use in CA, CO and NY. Legal in ME on all pre-OBD vehicles only. Consult your state’s aftermarket converter regulations for details.
- NO BREAK IN REQUIRED — Ready to operate with application-specific converter shell design and mat compression, no converter break in required after installation
- DURABLE — Features stainless-steel body with aluminized pipe and heat shields for durability
- FLEXIBLE SOLUTION — Customizable design features expandable bushings for easy fitment and may require specialized fabrication and/or welding for installation
- OE-STYLE DESIGN — Features aluminized heat shields when originally equipped, to match OE design, protecting the undercarriage from heat created by the converter
- BUY WITH CONFIDENCE — Backed by Walker’s 25,000-mile/40,000-kilometer emissions and 5-year 50,000-mile/80,000-kilometer structural integrity warranty. Visit Walkerexhaust.com for details.
MagnaFlow – Hm Grade Federal / Epa Compliant Universal Catalytic Converter (Part No.99206HM)
from
$194.99
Keep the check engine light off with MagnaFlow HM Grade Federal/EPA Compliant Universal Catalytic Converter 99206HM. The Universal design allows the part to fit a wide array of vehicles, and the stainless steel construction of this catalytic converter is highly resistant to corrosion. The single laser fusion weld greatly reduces the possibility of a leak, and our compact, low-mass design also allows for greater thermal efficiency. This replacement part is designed to meet or exceed Federal emissions requirements set forth by the EPA, complying with legal standards for OBDII Federally registered vehicles with Federal/EPA Emission systems.
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MagnaFlow – Oem Grade Federal / Epa Compliant Direct-Fit Catalytic Converter (Part No.52417)
from
$851.99
Keep the check engine light off with MagnaFlow OEM Grade Federal/EPA Compliant Direct-Fit Catalytic Converter 52417. With features including free-flowing mandrel-bent tubing and highly corrosion resistant stainless steel construction, easily install this converter yourself using the proper tools, no cutting or welding required. MagnaFlow’s state-of-the-art metrology department uses the latest 3D scanning systems during research and development, so you can be confident that your new part will fit and function like the original equipment. By replicating the OE design, the single laser fusion weld greatly reduces the possibility of a leak, and our compact, low-mass design also allows for greater thermal efficiency. MagnaFlow 52417 includes (2) Nuts, (2) Bolts and interchanges with OE parts 13229534, 13268587, 19420103, 19420281, 20907476, 20926631, 20960841, 22935119, 22935316, 84407224, 84407227. This replacement part is designed to meet or exceed Federal emissions requirements set forth by the EPA, complying with legal standards for OBDII Federally registered vehicles with California or Federal/EPA Emission systems.
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Walker – Ultra EPA Direct Fit Catalytic Converter Overall Length 55.350 IN (Part No.50584)
from
$537.99
Designed to comply with EPA standards while delivering premium performance with assured compliance, Walker Ultra direct-fit catalytic converters are available for import and domestic OBDII (1996 and newer) vehicles. Count on Walker Ultra converters for industry-leading fit and function.
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MagnaFlow – California Grade Carb Compliant Universal Catalytic Converter (Part No.448306)
from
$782.99
Keep the check engine light off with MagnaFlow California Grade CARB Compliant Universal Catalytic Converter 448306. The Universal design allows the part to fit a wide array of vehicles, and the stainless steel construction of this catalytic converter is highly resistant to corrosion. The single laser fusion weld greatly reduces the possibility of a leak, and our compact, low-mass design also allows for greater thermal efficiency. This replacement part is designed to meet or exceed California Air Resource Board requirements, and has undergone additional testing to comply with CARB guidelines to allow for legal use in California and CARB restricted states, for the listed vehicles.
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Victor Reinz – Catalytic Converter Gasket (Part No.71-13618-00)
from
$5.79
Product Features:
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- Choosing Victor Reinz assures getting OE quality parts in gaskets sets that have the coverage, contents, packaging and electronic cataloging to best meet the needs of the aftermarket.
- Dana engineering-approved for fit, form and function
- Meets or exceeds OE specifications
Walker – Exhaust Pipe Flange Gasket (Part No.31605)
from
$12.99
Complete your exhaust repair with Walker gaskets and flanges. Built from quality materials for long lasting durability, they’re available in a range of styles and sizes. Each component is designed to work seamlessly with OE exhaust systems and Walker aftermarket replacement parts.
Product Features:
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Product Features:
- AVAILABLE IN DIFFERENT SIZES — Offered in a variety of styles and sizes for a quality vehicle repair
- HEAT RESISTANT — Designed to resist heat for long-lasting performance
- PREMIUM MATERIALS — Made from high-quality materials for durability and long life
- ENGINEERING EXPERTISE — Parts are reviewed and validated and approved by Walker engineers through rigorous research and development
- REAL-WORLD TESTED — Parts are tested on-vehicle and validated to ensure optimal performance on the road
- EASIER TO INSTALL — Featuring slotted bolt holes (where applicable) for easy installation, gasket slips into place
- BETTER TOGETHER — Use premium Walker accessories when installing Walker catalytic converters and mufflers for a complete exhaust system upgrade
Walker – Exhaust Pipe Flange Gasket (Part No.31599)
from
$17.99
Complete your exhaust repair with Walker gaskets and flanges. Built from quality materials for long lasting durability, they’re available in a range of styles and sizes. Each component is designed to work seamlessly with OE exhaust systems and Walker aftermarket replacement parts.
Product Features:
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Product Features:
- AVAILABLE IN DIFFERENT SIZES — Offered in a variety of styles and sizes for a quality vehicle repair
- HEAT RESISTANT — Designed to resist heat for long-lasting performance
- PREMIUM MATERIALS — Made from high-quality materials for durability and long life
- ENGINEERING EXPERTISE — Parts are reviewed and validated and approved by Walker engineers through rigorous research and development
- REAL-WORLD TESTED — Parts are tested on-vehicle and validated to ensure optimal performance on the road
- EASIER TO INSTALL — Featuring slotted bolt holes (where applicable) for easy installation, gasket slips into place
- BETTER TOGETHER — Use premium Walker accessories when installing Walker catalytic converters and mufflers for a complete exhaust system upgrade
Walker – Exhaust Pipe Flange Gasket (Part No.31602)
from
$8.99
Complete your exhaust repair with Walker gaskets and flanges. Built from quality materials for long lasting durability, they’re available in a range of styles and sizes. Each component is designed to work seamlessly with OE exhaust systems and Walker aftermarket replacement parts.
Product Features:
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Product Features:
- AVAILABLE IN DIFFERENT SIZES — Offered in a variety of styles and sizes for a quality vehicle repair
- HEAT RESISTANT — Designed to resist heat for long-lasting performance
- PREMIUM MATERIALS — Made from high-quality materials for durability and long life
- ENGINEERING EXPERTISE — Parts are reviewed and validated and approved by Walker engineers through rigorous research and development
- REAL-WORLD TESTED — Parts are tested on-vehicle and validated to ensure optimal performance on the road
- EASIER TO INSTALL — Featuring slotted bolt holes (where applicable) for easy installation, gasket slips into place
- BETTER TOGETHER — Use premium Walker accessories when installing Walker catalytic converters and mufflers for a complete exhaust system upgrade
Walker – Exhaust Pipe Flange Gasket (Part No.31400)
from
$2.79
Complete your exhaust repair with Walker gaskets and flanges. Available in a variety of styles and sizes, they’re designed to work with OE exhaust components and Walker aftermarket replacement parts.
Product Features:
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Product Features:
- AVAILABLE IN DIFFERENT SIZES : Offered in a variety of styles and sizes for a quality vehicle repair
- HEAT RESISTANT : Designed to resist heat for long-lasting performance
- PREMIUM MATERIALS : Made from high-quality materials for durability and long life
- ENGINEERING EXPERTISE : Parts are reviewed and validated and approved by Walker engineers through rigorous research and development
- REAL-WORLD TESTED : Parts are tested on-vehicle and validated to ensure optimal performance on the road
- EASIER TO INSTALL : Featuring slotted bolt holes (where applicable) for easy installation, gasket slips into place
- BETTER TOGETHER : Use premium Walker accessories when installing Walker catalytic converters and mufflers for a complete exhaust system upgrade
Walker – Exhaust Pipe Flange Gasket (Part No.31512)
from
$2.59
Complete your exhaust repair with Walker gaskets and flanges. Available in a variety of styles and sizes, they’re designed to work with OE exhaust components and Walker aftermarket replacement parts.
Product Features:
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Product Features:
- AVAILABLE IN DIFFERENT SIZES – Offered in a variety of styles and sizes for a quality vehicle repair
- HEAT RESISTANT – Designed to resist heat for long-lasting performance
- PREMIUM MATERIALS – Made from high-quality materials for durability and long life
- ENGINEERING EXPERTISE – Parts are reviewed and validated and approved by Walker engineers through rigorous research and development
- REAL-WORLD TESTED – Parts are tested on-vehicle and validated to ensure optimal performance on the road
- EASIER TO INSTALL – Featuring slotted bolt holes (where applicable) for easy installation, gasket slips into place
- BETTER TOGETHER – Use premium Walker accessories when installing Walker catalytic converters and mufflers for a complete exhaust system upgrade
Walker – Exhaust Pipe Flange Gasket (Part No.31337)
from
$2.59
Complete your exhaust repair with Walker gaskets and flanges. Built from quality materials for long lasting durability, they’re available in a range of styles and sizes. Each component is designed to work seamlessly with OE exhaust systems and Walker aftermarket replacement parts.
Product Features:
See More
Product Features:
- AVAILABLE IN DIFFERENT SIZES — Offered in a variety of styles and sizes for a quality vehicle repair
- HEAT RESISTANT — Designed to resist heat for long-lasting performance
- PREMIUM MATERIALS — Made from high-quality materials for durability and long life
- ENGINEERING EXPERTISE — Parts are reviewed and validated and approved by Walker engineers through rigorous research and development
- REAL-WORLD TESTED — Parts are tested on-vehicle and validated to ensure optimal performance on the road
- EASIER TO INSTALL — Featuring slotted bolt holes (where applicable) for easy installation, gasket slips into place
- BETTER TOGETHER — Use premium Walker accessories when installing Walker catalytic converters and mufflers for a complete exhaust system upgrade
Popular 2003 Chevrolet Impala Catalytic Converters Categories
Most Popular Catalytic Converter Gaskets for 2003 Chevrolet Impalas
Enhance your 2003 Chevrolet Impala with one of the 3 Catalytic Converter Gaskets we have in stock, starting at just $5.79.
Walker – Exhaust Pipe Flange Gasket (Part No.31602)
from
$8.99
Complete your exhaust repair with Walker gaskets and flanges. Built from quality materials for long lasting durability, they’re available in a range of styles and sizes. Each component is designed to work seamlessly with OE exhaust systems and Walker aftermarket replacement parts.
Product Features:
See More
Product Features:
- AVAILABLE IN DIFFERENT SIZES — Offered in a variety of styles and sizes for a quality vehicle repair
- HEAT RESISTANT — Designed to resist heat for long-lasting performance
- PREMIUM MATERIALS — Made from high-quality materials for durability and long life
- ENGINEERING EXPERTISE — Parts are reviewed and validated and approved by Walker engineers through rigorous research and development
- REAL-WORLD TESTED — Parts are tested on-vehicle and validated to ensure optimal performance on the road
- EASIER TO INSTALL — Featuring slotted bolt holes (where applicable) for easy installation, gasket slips into place
- BETTER TOGETHER — Use premium Walker accessories when installing Walker catalytic converters and mufflers for a complete exhaust system upgrade
Walker – Exhaust Pipe Flange Gasket (Part No.31605)
from
$12.99
Complete your exhaust repair with Walker gaskets and flanges. Built from quality materials for long lasting durability, they’re available in a range of styles and sizes. Each component is designed to work seamlessly with OE exhaust systems and Walker aftermarket replacement parts.
Product Features:
See More
Product Features:
- AVAILABLE IN DIFFERENT SIZES — Offered in a variety of styles and sizes for a quality vehicle repair
- HEAT RESISTANT — Designed to resist heat for long-lasting performance
- PREMIUM MATERIALS — Made from high-quality materials for durability and long life
- ENGINEERING EXPERTISE — Parts are reviewed and validated and approved by Walker engineers through rigorous research and development
- REAL-WORLD TESTED — Parts are tested on-vehicle and validated to ensure optimal performance on the road
- EASIER TO INSTALL — Featuring slotted bolt holes (where applicable) for easy installation, gasket slips into place
- BETTER TOGETHER — Use premium Walker accessories when installing Walker catalytic converters and mufflers for a complete exhaust system upgrade
Victor Reinz – Catalytic Converter Gasket (Part No.71-13618-00)
from
$5.79
Product Features:
See More
- Choosing Victor Reinz assures getting OE quality parts in gaskets sets that have the coverage, contents, packaging and electronic cataloging to best meet the needs of the aftermarket.
- Dana engineering-approved for fit, form and function
- Meets or exceeds OE specifications
Best-Selling 2003 Chevrolet Impala Catalytic Converters
Upgrade your Impala with one of our 13 best-selling Catalytic Converters, earning an average 4.33 stars rating across 51 reviews.
Walker – EPA Ultra-Boxed Direct Fit Converter (Part No.16536)
from
$399.99
Walker Ultra Direct-Fit Catalytic Converters, an industry leader for import And domestic applications, are engineered with durable stainless steel bodies. Walker Ultra Catalytic Converters are available for OBDII (1996 And newer) vehicles. Engineered for specific vehicle emissions requirements, And features a higher loading of precious metals, optimal substrate content, And a high technology washcoat to provide unsurpassed performance, And durability. Walker Ultra Catalytic Converters meet EPA emission requirements, And have a 25,000-mile catalytic performance warranty, in addition to a 5-year/50,000-mile structural integrity warranty.
Product Features:
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Product Features:
- EPA COMPLIANT — For use on OBDII vehicles, 1996 and newer. Not legal for sale or use in CA, CO or NY. Legal inME on EPA Federal Emission Equipped Vehicles only. Consult your state’s aftermarket converter regulations for details.
- Flange to flange, direct fit design bolts to existing exhaust
- Features ample precious metal load & proprietary wash coat technology
- Stainless steel body with aluminized pipe and heat shields for durability
- Thick OE-style flanges, hangers and brackets for enhanced strength
- OE-style routing and hanger position for easy installation
- Meets EPA emissions requirements
- Not legal for sale in California
Walker – Ultra EPA Direct Fit Catalytic Converter Overall Length 36.625 IN (Part No.54627)
from
$397.99
Designed to comply with EPA standards while delivering premium performance with assured compliance, Walker Ultra direct-fit catalytic converters are available for import and domestic OBDII (1996 and newer) vehicles. Count on Walker Ultra converters for industry-leading fit and function.
Product Features:
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Product Features:
- EPA COMPLIANT — For use on OBDII vehicles, 1996 and newer. Not legal for sale or use in CA, CO & NY. Legal in ME on EPA Federal Emission Equipped Vehicles only. Consult your state’s aftermarket converter regulations for details.
- DIRECT-FIT DESIGN — Direct-fit bolt-on replacement solution with OE-style hangers, brackets, routings and heat shields for easy installation that doesn’t require specialized fabrication and/or welding
- KEEPS CHECK ENGINE LIGHT OFF FOR EMISSIONS CODES — OE-style high-technology washcoat and optimal precious metal load delivers required reduction in tailpipe emissions to match vehicle application
- STRONG AND DURABLE — Features thick OE-style flanges, hangers and brackets for strength and durability
- OE-STYLE DESIGN — Features aluminized heat shields when originally equipped, to match OE design, protecting the undercarriage from heat created by the converter
- BUY WITH CONFIDENCE — Backed by Walker’s 25,000-mile/40,000-kilometer emissions and 5-year 50,000-mile/80,000-kilometer structural integrity warranty. Visit Walkerexhaust.com for details.
MagnaFlow – Hm Grade Federal / Epa Compliant Direct-Fit Catalytic Converter (Part No.23433)
from
$412.99
Keep the check engine light off with MagnaFlow HM Grade Federal/EPA Compliant Direct-Fit Catalytic Converter 23433. With features including free-flowing mandrel-bent tubing and highly corrosion resistant stainless steel construction, easily install this converter yourself using the proper tools, no cutting or welding required. MagnaFlow’s state-of-the-art metrology department uses the latest 3D scanning systems during research and development, so you can be confident that your new part will fit and function like the original equipment. By replicating the OE design, the single laser fusion weld greatly reduces the possibility of a leak, and our compact, low-mass design also allows for greater thermal efficiency. MagnaFlow 23433 includes (1) Flange Gasket, (1) Crush Ring Gasket. This replacement part is designed to meet or exceed Federal emissions requirements set forth by the EPA, complying with legal standards for OBDII Federally registered vehicles with Federal/EPA Emission systems.
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Walker – Ultra EPA Universal Catalytic Converter – 2.5" Inlet (ID) 2.5" Outlet (ID) (Part No.93253)
from
$197.99
Product Features:
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- EPA COMPLIANT – For use on OBDII vehicles, 1996 and newer. Not legal for sale or use in CA, CO & NY. Legal in ME on EPA Federal Emission Equipped Vehicles only. Consult your state’s aftermarket converter regulations for details.
- KEEPS CHECK ENGINE LIGHT OFF FOR EMISSIONS CODES – OE-style high-technology wash coat and optimal precious metal load delivers required reduction in tailpipe emissions to match vehicle application
- DURABLE – Features stainless-steel body with aluminized pipe and heat shields for durability
- FLEXIBLE SOLUTION – Customizable design features expandable bushings for easy fitment and may require specialized fabrication and welding for installation
- OE-STYLE DESIGN – Features aluminized heat shields when originally equipped, to match OE design, protecting the undercarriage from heat created by the converter
- BUY WITH CONFIDENCE – Backed by Walker’s 25,000-mile/40,000-kilometer emissions and 50,000-mile/80,000-kilometer structural integrity limited warranty. Visit Walkerexhaust.com for details.
Walker – Ultra EPA Direct Fit Catalytic Converter Overall Length 38.500 IN (Part No.54626)
from
$411.99
Designed to comply with EPA standards while delivering premium performance with assured compliance, Walker Ultra direct-fit catalytic converters are available for import and domestic OBDII (1996 and newer) vehicles. Count on Walker Ultra converters for industry-leading fit and function.
Product Features:
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Product Features:
- EPA COMPLIANT — For use on OBDII vehicles, 1996 and newer. Not legal for sale or use in CA, CO & NY. Legal in ME on EPA Federal Emission Equipped Vehicles only. Consult your state’s aftermarket converter regulations for details.
- DIRECT-FIT DESIGN — Direct-fit bolt-on replacement solution with OE-style hangers, brackets, routings and heat shields for easy installation that doesn’t require specialized fabrication and/or welding
- KEEPS CHECK ENGINE LIGHT OFF FOR EMISSIONS CODES — OE-style high-technology washcoat and optimal precious metal load delivers required reduction in tailpipe emissions to match vehicle application
- STRONG AND DURABLE — Features thick OE-style flanges, hangers and brackets for strength and durability
- OE-STYLE DESIGN — Features aluminized heat shields when originally equipped, to match OE design, protecting the undercarriage from heat created by the converter
- BUY WITH CONFIDENCE — Backed by Walker’s 25,000-mile/40,000-kilometer emissions and 5-year 50,000-mile/80,000-kilometer structural integrity warranty. Visit Walkerexhaust.com for details.
MagnaFlow – Hm Grade Federal / Epa Compliant Direct-Fit Catalytic Converter (Part No.23405)
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$426.99
Keep the check engine light off with MagnaFlow HM Grade Federal/EPA Compliant Direct-Fit Catalytic Converter 23405. With features including free-flowing mandrel-bent tubing and highly corrosion resistant stainless steel construction, easily install this converter yourself using the proper tools, no cutting or welding required. MagnaFlow’s state-of-the-art metrology department uses the latest 3D scanning systems during research and development, so you can be confident that your new part will fit and function like the original equipment. By replicating the OE design, the single laser fusion weld greatly reduces the possibility of a leak, and our compact, low-mass design also allows for greater thermal efficiency. MagnaFlow 23405 includes (1) Flange Gasket, (1) Crush Ring Gasket. This replacement part is designed to meet or exceed Federal emissions requirements set forth by the EPA, complying with legal standards for OBDII Federally registered vehicles with Federal/EPA Emission systems.
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MagnaFlow – Oem Grade Federal / Epa Compliant Universal Catalytic Converter (Part No.51206)
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$211.99
Keep the check engine light off with MagnaFlow OEM Grade Federal/EPA Compliant Universal Catalytic Converter 51206. The Universal design allows the part to fit a wide array of vehicles, and the stainless steel construction of this catalytic converter is highly resistant to corrosion. The single laser fusion welds greatly reduces the possibility of a leak, and our compact, low-mass design also allows for greater thermal efficiency. This replacement part is designed to meet or exceed Federal emissions requirements set forth by the EPA, complying with legal standards for OBDII Federally registered vehicles with Federal/EPA Emission systems.
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Walker – EPA Ultra-Boxed Direct Fit Converter (Part No.16537)
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$412.99
Walker Ultra Direct-Fit Catalytic Converters, an industry leader for import And domestic applications, are engineered with durable stainless steel bodies. Walker Ultra Catalytic Converters are available for OBDII (1996 And newer) vehicles. Engineered for specific vehicle emissions requirements, And features a higher loading of precious metals, optimal substrate content, And a high technology washcoat to provide unsurpassed performance, And durability. Walker Ultra Catalytic Converters meet EPA emission requirements, And have a 25,000-mile catalytic performance warranty, in addition to a 5-year/50,000-mile structural integrity warranty.
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- EPA COMPLIANT — For use on OBDII vehicles, 1996 and newer. Not legal for sale or use in CA, CO or NY. Legal inME on EPA Federal Emission Equipped Vehicles only. Consult your state’s aftermarket converter regulations for details.
- Flange to flange, direct fit design bolts to existing exhaust
- Features ample precious metal load & proprietary wash coat technology
- Stainless steel body with aluminized pipe and heat shields for durability
- Thick OE-style flanges, hangers and brackets for enhanced strength
- OE-style routing and hanger position for easy installation
- Meets EPA emissions requirements
- Not legal for sale in California
MagnaFlow – Hm Grade Federal / Epa Compliant Universal Catalytic Converter (Part No.99206HM)
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$194.99
Keep the check engine light off with MagnaFlow HM Grade Federal/EPA Compliant Universal Catalytic Converter 99206HM. The Universal design allows the part to fit a wide array of vehicles, and the stainless steel construction of this catalytic converter is highly resistant to corrosion. The single laser fusion weld greatly reduces the possibility of a leak, and our compact, low-mass design also allows for greater thermal efficiency. This replacement part is designed to meet or exceed Federal emissions requirements set forth by the EPA, complying with legal standards for OBDII Federally registered vehicles with Federal/EPA Emission systems.
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MagnaFlow – California Grade Carb Compliant Direct-Fit Catalytic Converter (Part No.4561396)
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$1310.00
Keep the check engine light off with MagnaFlow California Grade CARB Compliant Direct-Fit Catalytic Converter 4561396. With features including free-flowing mandrel-bent tubing and highly corrosion resistant stainless steel construction, easily install this converter yourself using the proper tools, no cutting or welding required. MagnaFlow’s state-of-the-art metrology department uses the latest 3D scanning systems during research and development, so you can be confident that your new part will fit and function like the original equipment. By replicating the OE design, the single laser fusion weld greatly reduces the possibility of a leak, and our compact, low-mass design also allows for greater thermal efficiency. MagnaFlow 4561396 includes (1) Flange Gasket, (1) Crush Ring Gasket. This replacement part is designed to meet or exceed California Air Resource Board requirements, and has undergone additional testing to comply with CARB guidelines to allow for legal use in California and CARB restricted states, for the listed vehicles.
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- Durable 308 stainless steel MIG welds
- Simplifies installation with essential gaskets and hardware being included in the box
- Expertly crafted to replicate OEM-like flow dynamics, maintaining factory performance and fuel efficiency
- High strength 16 gauge 409 stainless steel tubing for exceptional corrosion resistance and maximum service life
- OE-sized barbed exhaust hangers made from corrosion-resistant 410 stainless steel, designed to reduce noise and vibration
- Mandrel bent tubing retains OEM-like design and geometry, ensuring smooth exhaust flow for peak fuel economy and engine operation
- Your trusted source for CARB-compliant catalytic converters, providing assurance of genuine compliance while delivering quality that will last
Walker – CalCat CARB Universal Catalytic Converter 2.5" Inlet (ID) 2.5" Outlet (ID) (Part No.82618)
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$641.99
Designed, tested and validated for assured compliance to meet CARB standards, Walker CalCat universal catalytic converters are available for OBDII (1996 and newer) and non-OBD (1995 and older) vehicles. Walker CalCat catalytic converters are thoroughly tested to ensure they meet CARB performance requirements.
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MagnaFlow – Oem Grade Federal / Epa Compliant Direct-Fit Catalytic Converter (Part No.51396)
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$447.99
Keep the check engine light off with MagnaFlow OEM Grade Federal/EPA Compliant Direct-Fit Catalytic Converter 51396. With features including free-flowing mandrel-bent tubing and highly corrosion resistant stainless steel construction, easily install this converter yourself using the proper tools, no cutting or welding required. MagnaFlow’s state-of-the-art metrology department uses the latest 3D scanning systems during research and development, so you can be confident that your new part will fit and function like the original equipment. By replicating the OE design, the single laser fusion weld greatly reduces the possibility of a leak, and our compact, low-mass design also allows for greater thermal efficiency. MagnaFlow 51396 includes (1) Flange Gasket, (1) Crush Ring Gasket. This replacement part is designed to meet or exceed Federal emissions requirements set forth by the EPA, complying with legal standards for OBDII Federally registered vehicles with California or Federal/EPA Emission systems.
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MagnaFlow – Oem Grade Federal / Epa Compliant Direct-Fit Catalytic Converter (Part No.51532)
from
$433.99
Keep the check engine light off with MagnaFlow OEM Grade Federal/EPA Compliant Direct-Fit Catalytic Converter 51532. With features including free-flowing mandrel-bent tubing and highly corrosion resistant stainless steel construction, easily install this converter yourself using the proper tools, no cutting or welding required. MagnaFlow’s state-of-the-art metrology department uses the latest 3D scanning systems during research and development, so you can be confident that your new part will fit and function like the original equipment. By replicating the OE design, the single laser fusion weld greatly reduces the possibility of a leak, and our compact, low-mass design also allows for greater thermal efficiency. MagnaFlow 51532 includes (1) Flange Gasket, (1) Crush Ring Gasket. This replacement part is designed to meet or exceed Federal emissions requirements set forth by the EPA, complying with legal standards for OBDII Federally registered vehicles with California or Federal/EPA Emission systems.
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Top-Rated Catalytic Converter Brands For Your 2003 Chevrolet Impala
When it comes to finding the perfect Catalytic Converter for your 2003 Chevrolet Impala, Advance Auto Parts has you covered with a wide selection of high-quality OEM and aftermarket options from 3 trusted brands. We carry the most popular Catalytic Converter brands including Walker and MagnaFlow, and more, all known for their exceptional customer ratings (average brand rating of 4.2 stars) and competitive prices, as low as $8.99. Purchasing a Catalytic Converter from us here at Advance Auto Parts is a smart move for both you and your 2003 Chevrolet Impala, providing peace of mind with parts that meet or exceed OEM standards.
Popular Walker 2003 Chevrolet Impala Catalytic Converters
If you’re looking for a top-quality Catalytic Converter for your 2003 Chevrolet Impala, Advance Auto Parts has exactly what you need with our selection of Walker Catalytic Converters. We have 3 Walker Catalytic Converters in stock for this fitment, all known for their durability and precision fit. With prices starting at just $8.99 and an average cost of $268.99, you’ll find the perfect Catalytic Converter for your needs and budget. Walker Catalytic Converters for the 2003 Chevrolet Impala come highly rated, with over 17 customer reviews and an impressive average rating of 4.2 stars. Choosing a Walker Catalytic Converter from Advance Auto Parts is a smart move to ensure quality and value for your vehicle.
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$397.99
(14)
Ultra EPA Direct Fit Catalytic Converter Overall Length 36.625 IN
“I always love Walker Direct Fit cat. converters. An easy install every time.”
Top-Quality MagnaFlow 2003 Chevrolet Impala Catalytic Converters
For those in search of a high-quality Catalytic Converter for their 2003 Chevrolet Impala, Advance Auto Parts offers a great selection of MagnaFlow Catalytic Converters. With 2 MagnaFlow Catalytic Converters in stock, you can trust you’re getting top-tier parts designed for durability and a perfect fit. Prices for these Catalytic Converters start at just $412.99, with an average price of $419.99, giving you a range of options to suit your budget. Backed by over 18 customer ratings and an average rating of 4.1 stars, MagnaFlow Catalytic Converters provide both reliability and excellent performance. Choosing a MagnaFlow Catalytic Converter from Advance Auto Parts is a smart investment in your vehicle’s performance and longevity.
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$412.99
(5)
Hm Grade Federal / Epa Compliant Direct-Fit Catalytic Converter
“After several mechanics “Checking” my car for months and numerous friends making suggestions, I finally made the decision to go on line to Advance Aut”
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$426.99
(13)
Hm Grade Federal / Epa Compliant Direct-Fit Catalytic Converter
“This product fit perfectly and sounds great. Even though it came with gaskets, I ordered some different ones as they were a better quality. it has a ”
FAQs for 2003 Chevrolet Impala Catalytic Converters
What are the best-selling Catalytic Converters for 2003 Chevrolet Impalas?
Out of 16 Catalytic Converters that fit 2003 Chevrolet Impalas, the following parts are the top sellers:
- Exhaust Pipe Flange Gasket (18371020) – $8.99
- Exhaust Pipe Flange Gasket (18371023) – $12.99
- EPA Ultra-Boxed Direct Fit Converter (10629653) – $399.99
What’s the price range for 2003 Chevrolet Impala Catalytic Converters?
The prices of Catalytic Converters for the 2003 Chevrolet Impala range from $5.79 up to $1,310.00 for the most premium parts.
What is the average price of a Catalytic Converter for a 2003 Chevrolet Impala?
The average price for Catalytic Converters for the 2003 Chevrolet Impala is $369.23. Keep in mind the variety of part types within our Catalytic Converter category, where you are likely to find a wide range of prices across a variety of parts and components.
Does Advance Auto Parts sell Catalytic Converters for other Chevrolet Impala model years?
What are the cheapest Catalytic Converters for my 2003 Chevrolet Impala?
The cheapest 2003 Chevrolet Impala Catalytic Converters we carry are:
- Catalytic Converter Gasket (50262640) – $5.79
- Exhaust Pipe Flange Gasket (18371020) – $8.99
- Exhaust Pipe Flange Gasket (18371023) – $12.99
- Hm Grade Federal / Epa Compliant Universal Catalytic Converter (22315797) – $194.99
- Ultra EPA Universal Catalytic Converter – 2.5" Inlet (ID) 2.5" Outlet (ID) (20200240) – $197.99
Does Advance Auto Parts sell Catalytic Converters for any other 2003 Chevrolet models?
Yes. We stock Catalytic Converters for 24 other popular 2003 Chevrolet models. Some of the most popular are 2003 Tahoe Catalytic Converters, 2003 Silverado 1500 Catalytic Converters, 2003 Malibu Catalytic Converters, 2003 Suburban 1500 Catalytic Converters, and 2003 Monte Carlo Catalytic Converters.
What are the top-rated Catalytic Converters that fit the 2003 Chevrolet Impala?
Based on 137 reviews by customers, our 2003 Chevrolet Impala Catalytic Converters have an average customer rating of 4 stars. These are the highest-rated categories of Catalytic Converters for the 2003 Chevrolet Impala and their top-rated products:
- Catalytic Converters
- EPA Ultra-Boxed Direct Fit Converter (10629653) – $399.99
- Hm Grade Federal / Epa Compliant Direct-Fit Catalytic Converter (22316900) – $412.99
- Ultra EPA Direct Fit Catalytic Converter Overall Length 36.625 IN (18390408) – $397.99
- Catalytic Converter Gaskets
- Exhaust Pipe Flange Gasket (18371020) – $8.99
- Exhaust Pipe Flange Gasket (18371023) – $12.99
What types of Catalytic Converters do you sell for my 2003 Chevrolet Impala?
As of 6/2/26, these are some of the most in-demand types of Catalytic Converters for a 2003 Chevrolet Impala:
Can I get help with 2003 Chevrolet Impala Catalytic Converter orders?
Contact our customer support team by chat or phone, through the help desk page, where you can find instant answers about Chevrolet Catalytic Converters and more.
What is your return policy for Chevrolet Impala Catalytic Converters?
Advance Auto Parts keeps returns simple. For new Chevrolet Impala Catalytic Converters and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.