2003 Subaru Outback Catalytic Converters

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Keep Your 2003 Subaru Outback 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 Subaru Outback looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Catalytic Converters and Catalytic Converter Gaskets. 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. For example, Walker Catalytic Converters start at just $5.99 with an average 4.2 star rating. With over 54 reviews and a solid 3.8 star average, you can shop with confidence knowing other Subaru Outback owners approve.

Competitive Prices and Extensive Inventory

The average price for a 2003 Subaru Outback Catalytic Converter at Advance Auto Parts is around $492.16, with a range that starts at $5.99 and goes up to $1,409.00. With 12 options in stock from 2 trusted brands, finding the right fit is easy. Popular picks like "Walker CalCat CARB Universal Catalytic Converter 2"" Inlet (ID) 2"" Outlet (ID), 82525", Walker CalCat CARB Direct Fit Catalytic Converter Overall Length 36.750 IN, 82662, and MagnaFlow Oem Grade Federal / Epa Compliant Universal Catalytic Converter, 51184 start at just $195.99 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 Subaru Outback in peak condition, inside and out.

Essential 2003 Subaru Outback Catalytic Converters

MagnaFlow – MagnaFlow Oem Grade Federal / Epa Compliant Direct-Fit Manifold Catalytic Converter, 51864 (Part No.51864)

MagnaFlow Oem Grade Federal / Epa Compliant Direct-Fit Manifold Catalytic Converter, 51864

from

$1105.00
Keep the check engine light off with MagnaFlow OEM Grade Federal/EPA Compliant Direct-Fit Manifold Catalytic Converter 51864. 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. This Direct-Fit Manifold Catalytic Converter is designed to fit the 2004-2005 Subaru Legacy 2.5L & 2004-2005 Subaru Outback 2.5L. MagnaFlow 51864 includes (1) Donut Gasket, (2) Flange Gaskets and interchanges with OE parts 44101AE10A, 44101AE11A, 44101AG19A, 44101AG20A. 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 – MagnaFlow Oem Grade Federal / Epa Compliant Direct-Fit Catalytic Converter, 52510 (Part No.52510)

MagnaFlow Oem Grade Federal / Epa Compliant Direct-Fit Catalytic Converter, 52510

from

$477.99
Keep the check engine light off with MagnaFlow OEM Grade Federal/EPA Compliant Direct-Fit Catalytic Converter 52510. 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 52510 includes (1) Torca Clamp, (1) Donut Gasket, (1) Flange Gasket and interchanges with OE parts 44620AC590, 44620AC630, 44620AD14A, 44620AD14B, 44620AD15A, 44620AD15B. 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 – MagnaFlow Oem Grade Federal / Epa Compliant Direct-Fit Catalytic Converter, 49160 (Part No.49160)

MagnaFlow Oem Grade Federal / Epa Compliant Direct-Fit Catalytic Converter, 49160

from

$1054.00
Keep the check engine light off with MagnaFlow OEM Grade Federal/EPA Compliant Direct-Fit Catalytic Converter 49160. 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 49160 includes (2) Nuts, (2) Bolts, (2) Flange Gaskets and interchanges with OE parts 44102AE200, 44102AG030, 44102AG040, 44612AA120, 44612AA130, 44612AA210, 44612AA280, 44612AA290, 44612AA350, 44612AA360, 44612AA370, 44612AA540, 44612AA590. 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 – MagnaFlow Oem Grade Federal / Epa Compliant Direct-Fit Manifold Catalytic Converter, 52305 (Part No.52305)

MagnaFlow Oem Grade Federal / Epa Compliant Direct-Fit Manifold Catalytic Converter, 52305

from

$875.99
Keep the check engine light off with MagnaFlow OEM Grade Federal/EPA Compliant Direct-Fit Manifold Catalytic Converter 52305. 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 52305 includes (3) Bolts, (3) Flange Gaskets and interchanges with OE parts 44620AA740, 44620AA76A, 44620AA77A, 44620AB24A, 44620AB350, 44620AB43A, 44620AB620, 44620AC07A, 44620AC12A, 44620AC750. 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 – MagnaFlow California Grade Carb Compliant Direct-Fit Catalytic Converter, 5491827 (Part No.5491827)

MagnaFlow California Grade Carb Compliant Direct-Fit Catalytic Converter, 5491827

from

$597.99
Keep the check engine light off with MagnaFlow California Grade CARB Compliant Direct-Fit Catalytic Converter 5491827. 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. This Direct-Fit Catalytic Converter is designed to fit the 2005 Subaru Outback 2.5L. MagnaFlow 5491827 includes (1) Donut Gasket, (1) Flange Gasket and interchanges with OE parts 44101AG070, 44101AG080, 44611AA090, 44611AA100, 44611AA200, 44611AA210. 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 – MagnaFlow California Grade Carb Compliant Universal Catalytic Converter, 5411205 (Part No.5411205)

MagnaFlow California Grade Carb Compliant Universal Catalytic Converter, 5411205

from

$651.99
Keep the check engine light off with MagnaFlow California Grade CARB Compliant Universal Catalytic Converter 5411205. 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 – MagnaFlow Oem Grade Federal / Epa Compliant Direct-Fit Catalytic Converter, 51448 (Part No.51448)

MagnaFlow Oem Grade Federal / Epa Compliant Direct-Fit Catalytic Converter, 51448

from

$413.99
Keep the check engine light off with MagnaFlow OEM Grade Federal/EPA Compliant Direct-Fit Catalytic Converter 51448. 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 51448 includes (1) Torca Clamp, (1) Donut Gasket, (1) Flange Gasket and interchanges with OE parts 44620AB25A, 44620AB400, 44620AB44A, 44620AB630, 44620AC760. 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 – MagnaFlow Oem Grade Federal / Epa Compliant Direct-Fit Catalytic Converter, 21-275 (Part No.21-275)

MagnaFlow Oem Grade Federal / Epa Compliant Direct-Fit Catalytic Converter, 21-275

from

$468.99
Keep the check engine light off with MagnaFlow OEM Grade Federal/EPA Compliant Direct-Fit Catalytic Converter 21-275. 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. This Direct-Fit Catalytic Converter is designed to fit the 2009 Subaru Legacy 2.5L & 2008-2009 Subaru Outback 2.5L. MagnaFlow 21-275 includes (2) Nuts, (2) Bolts, (1) Donut Gasket, (1) Flange Gasket and interchanges with OE parts 44611AA330. 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 – Walker Ultra EPA Direct Fit Catalytic Converter Overall Length 27.625 IN, 16851 (Part No.16851)

Walker Ultra EPA Direct Fit Catalytic Converter Overall Length 27.625 IN, 16851

from

$1202.00
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 – MagnaFlow Hm Grade Federal / Epa Compliant Direct-Fit Catalytic Converter, 24827 (Part No.24827)

MagnaFlow Hm Grade Federal / Epa Compliant Direct-Fit Catalytic Converter, 24827

from

$381.99
Keep the check engine light off with MagnaFlow HM Grade Federal/EPA Compliant Direct-Fit Catalytic Converter 24827. 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. This Direct-Fit Catalytic Converter is designed to fit the 2005-2008 Subaru Legacy 2.5L & 2005-2007 Subaru Outback 2.5L. MagnaFlow 24827 includes (1) Donut Gasket, (1) Flange Gasket and interchanges with OE parts 44101AG070, 44101AG080, 44611AA090, 44611AA100, 44611AA200, 44611AA210. 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 – Walker CalCat CARB Direct Fit Catalytic Converter Overall Length 36.375 IN, 84389 (Part No.84389)

Walker CalCat CARB Direct Fit Catalytic Converter Overall Length 36.375 IN, 84389

from

$1155.00
Designed, tested and validated for assured compliance to meet CARB standards, Walker CalCat direct-fit catalytic converters are available for OBDII (1996 and newer) and non-OBD (1995 and older) vehicles and delivers a precise OE-style fit. Walker CalCat catalytic converters are thoroughly tested to ensure they meet CARB performance requirements.
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MagnaFlow – MagnaFlow Oem Grade Federal / Epa Compliant Direct-Fit Catalytic Converter, 49984 (Part No.49984)

MagnaFlow Oem Grade Federal / Epa Compliant Direct-Fit Catalytic Converter, 49984

from

$522.99
Keep the check engine light off with MagnaFlow OEM Grade Federal/EPA Compliant Direct-Fit Catalytic Converter 49984. 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 49984 includes (1) Bolt, (1) Flat Washer, (1) Donut Gasket, (1) Flange Gasket and interchanges with OE parts 44101FE040, 44101FE090, 44611AA130, 44611AA300. 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 – MagnaFlow Hm Grade Federal / Epa Compliant Universal Catalytic Converter, 99176HM (Part No.99176HM)

MagnaFlow Hm Grade Federal / Epa Compliant Universal Catalytic Converter, 99176HM

from

$326.99
Keep the check engine light off with MagnaFlow HM Grade Federal/EPA Compliant Universal Catalytic Converter 99176HM. 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 – MagnaFlow California Grade Carb Compliant Direct-Fit Catalytic Converter, 5571448 (Part No.5571448)

MagnaFlow California Grade Carb Compliant Direct-Fit Catalytic Converter, 5571448

from

$876.99
Keep the check engine light off with MagnaFlow California Grade CARB Compliant Direct-Fit Catalytic Converter 5571448. 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 5571448 includes (1) Torca Clamp, (1) Donut Gasket, (1) Flange Gasket and interchanges with OE parts 44620AB25A, 44620AB400, 44620AB44A, 44620AB630, 44620AC760. 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 – Victor Reinz Catalytic Converter Gasket, 71-15760-00 (Part No.71-15760-00)

Victor Reinz Catalytic Converter Gasket, 71-15760-00

from

$28.49
With Victor Reinz gaskets, you can be sure you are getting sealing solutions that deliver OE quality gasket technology and engineering. That is because Victor Reinz is an original equipment supplier and the trusted choice of manufacturers the world over, offering broad coverage for foreign and domestic cars and trucks. In Victor Reinz gasket sets, you get the right combination of components needed for fast, long-lasting repairs.
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Walker – Walker Exhaust Pipe Flange Gasket, 31313 (Part No.31313)

Walker Exhaust Pipe Flange Gasket, 31313

from

$2.99
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.
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Walker – Walker Exhaust Pipe Flange Gasket, 31388 (Part No.31388)

Walker Exhaust Pipe Flange Gasket, 31388

from

$5.99
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.
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Most Popular Catalytic Converters for 2003 Subaru Outbacks

Enhance your 2003 Subaru Outback with one of the 11 Catalytic Converters we have in stock, starting at just $185.99.

Walker – Walker Ultra EPA Direct Fit Catalytic Converter Overall Length 34.750 IN, 54562 (Part No.54562)

Walker Ultra EPA Direct Fit Catalytic Converter Overall Length 34.750 IN, 54562

from

$479.99
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 – "Walker CalCat CARB Universal Catalytic Converter 2"" Inlet (ID) 2"" Outlet (ID), 82525" (Part No.82525)

"Walker CalCat CARB Universal Catalytic Converter 2"" Inlet (ID) 2"" Outlet (ID), 82525"

from

$704.99
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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Walker – Walker CalCat CARB Direct Fit Catalytic Converter Overall Length 36.750 IN, 82662 (Part No.82662)

Walker CalCat CARB Direct Fit Catalytic Converter Overall Length 36.750 IN, 82662

from

$1409.00
Designed, tested and validated for assured compliance to meet CARB standards, Walker CalCat direct-fit catalytic converters are available for OBDII (1996 and newer) and non-OBD (1995 and older) vehicles and delivers a precise OE-style fit. Walker CalCat catalytic converters are thoroughly tested to ensure they meet CARB performance requirements.
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MagnaFlow – MagnaFlow Hm Grade Federal / Epa Compliant Universal Catalytic Converter, 99104HM (Part No.99104HM)

MagnaFlow Hm Grade Federal / Epa Compliant Universal Catalytic Converter, 99104HM

from

$185.99
Keep the check engine light off with MagnaFlow HM Grade Federal/EPA Compliant Universal Catalytic Converter 99104HM. 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.
See More

MagnaFlow – MagnaFlow Oem Grade Federal / Epa Compliant Universal Catalytic Converter, 51184 (Part No.51184)

MagnaFlow Oem Grade Federal / Epa Compliant Universal Catalytic Converter, 51184

from

$195.99
Keep the check engine light off with MagnaFlow OEM Grade Federal/EPA Compliant Universal Catalytic Converter 51184. 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.
See More

MagnaFlow – MagnaFlow Oem Grade Federal / Epa Compliant Direct-Fit Catalytic Converter, 49490 (Part No.49490)

MagnaFlow Oem Grade Federal / Epa Compliant Direct-Fit Catalytic Converter, 49490

from

$792.99
Keep the check engine light off with MagnaFlow OEM Grade Federal/EPA Compliant Direct-Fit Catalytic Converter 49490. 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 49490 includes (1) O2 Port Plug, (1) Donut Gasket, (1) Flange Gasket and interchanges with OE parts 44139FA010, 44139FA160, 44139FA161, 44139SA000, 44139SA010, 44659AA00A. 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 – MagnaFlow Hm Grade Federal / Epa Compliant Direct-Fit Catalytic Converter, 93235 (Part No.93235)

MagnaFlow Hm Grade Federal / Epa Compliant Direct-Fit Catalytic Converter, 93235

from

$754.99
Keep the check engine light off with MagnaFlow HM Grade Federal/EPA Compliant Direct-Fit Catalytic Converter 93235. 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 93235 includes (1) O2 Port Plug, (1) Donut Gasket, (1) Flange Gasket and interchanges with OE parts 44139AE05A, 44139AE06A, 44139AE10A, 44139AE11A, 44139AE12A, 44139FA010, 44139FA160, 44139FA161, 44139SA000, 44139SA010, 44659AA01A. 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 – MagnaFlow California Grade Carb Compliant Universal Catalytic Converter, 441334 (Part No.441334)

MagnaFlow California Grade Carb Compliant Universal Catalytic Converter, 441334

from

$563.99
Keep the check engine light off with MagnaFlow California Grade CARB Compliant Universal Catalytic Converter 441334. 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 – MagnaFlow California Grade Carb Compliant Universal Catalytic Converter, 444504 (Part No.444504)

MagnaFlow California Grade Carb Compliant Universal Catalytic Converter, 444504

from

$405.99
Keep the check engine light off with MagnaFlow California Grade CARB Compliant Universal Catalytic Converter 444504. 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 – MagnaFlow Oem Grade Federal / Epa Compliant Universal Catalytic Converter, 51234 (Part No.51234)

MagnaFlow Oem Grade Federal / Epa Compliant Universal Catalytic Converter, 51234

from

$216.99
Keep the check engine light off with MagnaFlow OEM Grade Federal/EPA Compliant Universal Catalytic Converter 51234. 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.
See More

MagnaFlow – MagnaFlow Hm Grade Federal / Epa Compliant Universal Catalytic Converter, 99184HM (Part No.99184HM)

MagnaFlow Hm Grade Federal / Epa Compliant Universal Catalytic Converter, 99184HM

from

$188.99
Keep the check engine light off with MagnaFlow HM Grade Federal/EPA Compliant Universal Catalytic Converter 99184HM. 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.
See More

Best-Selling 2003 Subaru Outback Catalytic Converter Gasket

Upgrade your Outback with our best-selling Catalytic Converter Gasket with a 4.5 Starts rating across 22 reviews.

Walker – Walker Exhaust Pipe Flange Gasket, 31388 (Part No.31388)

Walker Exhaust Pipe Flange Gasket, 31388

from

$5.99
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.
See More

Top-Rated Catalytic Converter Brands For Your 2003 Subaru Outback

When it comes to finding the perfect Catalytic Converter for your 2003 Subaru Outback, Advance Auto Parts has you covered with a wide selection of high-quality OEM and aftermarket options from 2 trusted brands. We carry the most popular Catalytic Converter brands including Walker, and more, all known for their exceptional customer ratings (average brand rating of 4.2 stars) and competitive prices, as low as $5.99. Purchasing a Catalytic Converter from us here at Advance Auto Parts is a smart move for both you and your 2003 Subaru Outback, providing peace of mind with parts that meet or exceed OEM standards.

Popular Walker 2003 Subaru Outback Catalytic Converters

If you’re looking for a top-quality Catalytic Converter for your 2003 Subaru Outback, Advance Auto Parts has exactly what you need with our selection of Walker Catalytic Converters. We have 1 Walker Catalytic Converters in stock for this fitment, all known for their durability and precision fit. With prices starting at just $5.99, you’ll find the perfect Catalytic Converter for your needs and budget. Walker Catalytic Converters for the 2003 Subaru Outback come highly rated, with over 22 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.
Walker Exhaust Pipe Flange Gasket, 31388
from $5.99
(22)
Walker Exhaust Pipe Flange Gasket, 31388
“Worked great. Good product.”

FAQs for 2003 Subaru Outback Catalytic Converters

What are the best-selling Catalytic Converters for 2003 Subaru Outbacks?

Out of 12 Catalytic Converters that fit 2003 Subaru Outbacks, the following parts are the top sellers:

What’s the price range for 2003 Subaru Outback Catalytic Converters?

The prices of Catalytic Converters for the 2003 Subaru Outback range from $5.99 up to $1,409.00 for the most premium parts.

What is the average price of a Catalytic Converter for a 2003 Subaru Outback?

The average price for Catalytic Converters for the 2003 Subaru Outback is $492.16. 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 Subaru Outback model years?

Yes, we carry Catalytic Converters for 22 model years of Subaru Outbacks between 2000 and 2023. The following model years are the most popular for Catalytic Converter purchases: 2019, 2018, 2017, 2016, 2015, 2014, 2013, 2012, and 2011.

What are the cheapest Catalytic Converters for my 2003 Subaru Outback?

Does Advance Auto Parts sell Catalytic Converters for any other 2003 Subaru models?

Yes. We stock Catalytic Converters for 3 other popular 2003 Subaru models. Some of the most popular are 2003 Legacy Catalytic Converters, 2003 Impreza Catalytic Converters, 2003 Forester Catalytic Converters, and 2003 Baja Catalytic Converters.

What are the top-rated Catalytic Converters that fit the 2003 Subaru Outback?

Based on 54 reviews by customers, our 2003 Subaru Outback Catalytic Converters have an average customer rating of 3.8 stars. These are the highest-rated categories of Catalytic Converters for the 2003 Subaru Outback and their top-rated products:

What types of Catalytic Converters do you sell for my 2003 Subaru Outback?

As of 8/2/26, these are some of the most in-demand types of Catalytic Converters for a 2003 Subaru Outback:

Can I get help with 2003 Subaru Outback Catalytic Converter orders?

Contact our customer support team by chat or phone, through the help desk page, where you can find instant answers about Subaru Catalytic Converters and more.

What is your return policy for Subaru Outback Catalytic Converters?

Advance Auto Parts keeps returns simple. For new Subaru Outback Catalytic Converters and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.