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Catalytic Converter for 2004 Subaru Impreza

We have 42 Items In-stock. Select your vehicle's Submodel to continue.

Evan Fischer 49-State Legal (No CA) OE Replacement Catalytic Converter

This Evan Fischer 49-State Legal (No CA) Direct Fit Catalytic Converter is manufactured from high quality and durable stainless steel catalytic case, 16-gauge aluminized steel tubes, and heat shield for long lasting durability and better protection for your vehicle. It also features honeycomb catalyst that has maximum surface area flow. OBD-II and EPA compliant catalytic converter; It is a high quality aftermarket replacement for the OEM catalytic converter. Designed for easy installation - it requires no cutting or welding!

Evan Fischer also offers comprehensive manifold converter assemblies for newer vehicle models!

  • OBD-II And EPA compliant catalytic converter
  • Requires NO cutting or welding
  • Honeycomb catalyst with maximum surface area flow
  • 49-State Legal, not for sale or use in California; cannot be shipped to California addresses
  • 2-year or 25,000-mile Evan Fischer warranty on converter and 5-year or 50,000-mile Evan Fischer warranty on another components
Evan Fischer Catalytic Converter, Front And Rear, 49-state Legal - No CA Shipments, Direct Fit
$199.55 List Price $235.47 Save $35.92 Availability: In Stock
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  • SKU#: REPS960301
  • Quantity Sold: Assembly
  • Tube Material: Aluminized steel
  • Anticipated Ship Out Time: 1-2 Business Days
  • Catalyst Substrate Material: Ceramic honeycomb
  • Dimensions: 35.5 in. overall length
  • Warranty: 5-year or 50,000-mile limited warranty
see more Fits the following 2004 Subaru Impreza submodels:
  • 4 Cyl 2.5L | Outback, TS, RS
Rating: (see review/s)

"Replaced the original catalyst after 248 000 miles. ECL light went out and has stayed off. Reading the computer readings with my equipment the catalyst is working within specifications as required." posted by: putterer on July 5, 2014 view all 2 reviews

49-state legal Eastern Direct Fit Catalytic Converter

Eastern 49-State Legal Direct Fit Catalytic Converters

  • NANO technology for better converter efficiency
  • Advanced materials design for optimum engine output and catalytic efficiency
  • Complete range of inlet and outlet diameters
Backed by 3 decades of product expertise, Eastern continues to invest in state-of-the-art production equipment to guarantee only the best for their customers - making them ready for the future.

Note:
  • 49-state legal; Not legal in California and other states adopting California Emissions Standards; Not for sale or use in California and other states adopting California Emissions Standards; Cannot be shipped to California and such states
Eastern Catalytic Converter, Eastern ECO III, Front And Rear, 49-state Legal - No CA Shipments
$289.06 List Price $341.09 Save $52.03 Availability: In Stock
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  • SKU#: EAST40237
  • Product Fit: Direct Fit
  • Quantity Sold: Assembly
  • Tube Material: Aluminized steel
  • Anticipated Ship Out Time: 1-2 Business Days
  • Catalyst Substrate Material: Ceramic honeycomb
  • Dimensions: 35 in. overall length
  • Warranty: 5-year or 50,000-mile Eastern limited warranty
see more Fits the following 2004 Subaru Impreza submodels:
  • 4 Cyl 2.5L | Outback, TS, RS
Rating: (see review/s)

"Installed on my 2000 forester S model hardest part is getting the old one off used dremel and angle grinders takes quite a while but worth it as the car has 130k miles and the dealership wants over $2000 for the parts and labor. Gets it through the inspections and keeps it on the road. Used the same eastern catalytic brand with my 1999 subaru legacy sedan which helped me keep it on the road for over 320k miles before retiring it." posted by: rustybolt on April 27, 2014 view all 12 reviews

Eastern Catalytic Converter, Eastern Standard, Rear, 49-state Legal - No CA Shipments
$180.13 List Price $212.55 Save $32.42 Availability: In Stock
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  • SKU#: EAST40681
  • Product Fit: Direct Fit
  • Quantity Sold: Assembly
  • Tube Material: Aluminized steel
  • Anticipated Ship Out Time: 1-2 Business Days
  • Catalyst Substrate Material: Ceramic honeycomb
  • Dimensions: 23 in. overall length
  • Warranty: 5-year or 50,000-mile Eastern limited warranty
see more Fits the following 2004 Subaru Impreza submodels:
  • 4 Cyl 2.5L | Outback, TS, RS, WRX STI
Eastern Catalytic Converter, Eastern ECO II, Front, 49-state Legal - No CA Shipments
$240.58 List Price $283.88 Save $43.30 Availability: In Stock
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  • SKU#: EAST40680
  • Product Fit: Direct Fit
  • Quantity Sold: Assembly
  • Tube Material: Aluminized steel
  • Anticipated Ship Out Time: 1-2 Business Days
  • Catalyst Substrate Material: Ceramic honeycomb
  • Dimensions: 24.5 in. overall length
  • Warranty: 5-year or 50,000-mile Eastern limited warranty
see more Fits the following 2004 Subaru Impreza submodels:
  • 4 Cyl 2.5L | WRX STI

Eastern 49-state legal Universal Catalytic Converter

Eastern 49-State Legal Universal Catalytic Converters

  • NANO technology for better converter efficiency
  • Advanced materials design for optimum engine output and catalytic efficiency
  • Complete range of inlet and outlet diameters
  • Non-directional for ease of installation
Backed by 3 decades of product expertise, Eastern continues to invest in state-of-the-art production equipment to guarantee only the best for their customers - making them ready for the future.

Note:
  • 49-state legal; Not legal in California and other states adopting California Emissions Standards; Not for sale or use in California and other states adopting California Emissions Standards; Cannot be shipped to California and such states
Eastern Catalytic Converter, Eastern Standard, Front, 49-state Legal - No CA Shipments
$54.91 List Price $64.79 Save $9.88 Availability: In Stock
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  • SKU#: EAST82465
  • Product Fit: Minor Modifications
  • Quantity Sold: Sold Individually
  • Tube Material: Aluminized steel
  • Anticipated Ship Out Time: 1-2 Business Days
  • Replaces OE Number: 04581701AI
  • Warranty: 5-year or 50,000-mile Eastern limited warranty
see more Fits the following 2004 Subaru Impreza submodels:
  • 4 Cyl 2.5L | WRX STI
Rating: (see review/s)

"Good product, easy to install. Better pick up and go, better gas mileage" posted by: Heather on May 15, 2012 view all 2 reviews

Eastern Catalytic Converter, Eastern Standard, Front, 49-state Legal - No CA Shipments
$51.89 List Price $61.23 Save $9.34 Availability: In Stock
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  • SKU#: EAST70343
  • Product Fit: Minor Modifications
  • Quantity Sold: Sold Individually
  • Tube Material: Aluminized steel
  • Anticipated Ship Out Time: 1-2 Business Days
  • Catalyst Substrate Material: Ceramic honeycomb
  • Warranty: 5-year or 50,000-mile Eastern limited warranty
see more Fits the following 2004 Subaru Impreza submodels:
  • 4 Cyl 2.5L | Outback, TS, RS, WRX STI
Rating: (see review/s)

"with out the O2 sensor plugged in it wouldnt pass N.Y. inspection." posted by: skippy on September 24, 2012

Magnaflow 49-State Legal Semi-Universal Catalytic Converter

  • Not legal for use in California or in states adopting the California emissions standards
  • Semi-universal design – cut out your old catalytic converter and weld in the new one
  • Stainless Steel Construction
  • Legendary Magnaflow quality, power, and sound
  • Ceramic, honeycomb catalyst designed for maximum flow and surface area

When you want the best, you want Magnaflow!  These 49-State Legal semi-universal catalytic converters have a catalyst specifically designed for your vehicle – just cut out your old catalytic converter and weld in the new one.  Engineered to cut emissions and improve performance.

Magnaflow Catalytic Converter, Magnaflow 49-State Semi-Universal, Rear, 49-state Legal - No CA Shipments
$103.16 List Price $133.50 Save $30.34 Availability: In Stock
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  • SKU#: M6699176HM
  • Product Fit: Minor Modifications
  • Quantity Sold: Sold Individually
  • Tube Material: Stainless Steel
  • Anticipated Ship Out Time: 1-2 Business Days
  • Catalyst Substrate Material: Ceramic honeycomb
  • Dimensions: 9 in. body length, 6.5 in. width, 11.5 in. overall length
  • EO Number: Not applicable
  • Warranty: Magnaflow 25,000 Mile Limited Warranty
see more Fits the following 2004 Subaru Impreza submodels:
  • 4 Cyl 2.0L | WRX
  • 4 Cyl 2.5L | WRX STI
Magnaflow Catalytic Converter, Magnaflow 49-State Semi-Universal, Front, 49-state Legal - No CA Shipments
$97.63 List Price $126.35 Save $28.72 Availability: In Stock
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  • SKU#: M6699206HM
  • Product Fit: Minor Modifications
  • Quantity Sold: Sold Individually
  • Tube Material: Stainless Steel
  • Anticipated Ship Out Time: 1-2 Business Days
  • Catalyst Substrate Material: Ceramic honeycomb
  • Dimensions: 9 in. L x 5.13 in. W, 13 in. overall length
  • EO Number: Not applicable
  • Notes: Does not have provision for O2 sensor
  • Warranty: Magnaflow 25,000 Mile Limited Warranty
see more Fits the following 2004 Subaru Impreza submodels:
  • 4 Cyl 2.0L | WRX
Rating: (see review/s)

"While it is necessary to adapt to pipe size on vehicle, the rear requires leaving part of the previous converter on. i.e. The very end of the old converter. That will be the same OD as the new converrter. The old fitting has to be ground down, or as I did, filed. I might better have used a coupling. When I do the left bank, I may try cutting the old portion off, and adapt down. I shall try the coupling. You must have a local supplier who stocks a wide variety of fittings! They are inexpensive. Remember, the adapters can be shortened to allow slippage while installing. They can always be shortened, but cannot be lengthened once cut off, so measure carefully. Think ahead. Procrastinate. As it is, I am still going to have a friend braze the rear end joint, as it leaks a little. Using a coupling most likely would have avoided the leakage." posted by: suvguy on July 24, 2012

Magnaflow OEM Grade (49-State Legal) Direct Fit Catalytic Converter

  • Not legal for use in California or in states adopting the California emissions standards
  • Designed for vehicles equipped with California emissions but not registered or driven in a state adopting the California emissions standards (see item details for more information)
  • Easy bolt-on Installation with no cutting, welding or bending required
  • Stainless Steel Construction
  • Legendary Magnaflow quality, power, and sound
  • Ceramic, honeycomb catalyst designed for maximum flow and surface area

When you want the best, you want Magnaflow!  These 49-State Legal direct-fit catalytic converters are specifically designed to fit your vehicle with a no-hassle installation – no cutting, welding, or bending required.  Engineered to cut emissions and improve performance.

Magnaflow Catalytic Converter, Magnaflow OEM Grade (49-State) Direct Fit, Rear, 49-state Legal - No CA Shipments
$387.14 List Price $501.01 Save $113.87 Availability: In Stock
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  • SKU#: M6649984
  • Product Fit: Direct Fit
  • Quantity Sold: Assembly
  • Tube Material: Stainless Steel
  • Anticipated Ship Out Time: 1-2 Business Days
  • Catalyst Substrate Material: Ceramic honeycomb
  • EO Number: Not applicable
  • Warranty: Magnaflow 25,000 Mile Limited Warranty
see more Fits the following 2004 Subaru Impreza submodels:
  • 4 Cyl 2.5L | Outback, TS, RS, WRX STI
Magnaflow Catalytic Converter, Magnaflow OEM Grade (49-State) Direct Fit, Front, 49-state Legal - No CA Shipments
$566.50 List Price $733.12 Save $166.62 Availability: In Stock
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  • SKU#: M6649162
  • Product Fit: Direct Fit
  • Quantity Sold: Assembly
  • Tube Material: Stainless Steel
  • Anticipated Ship Out Time: 1-2 Business Days
  • Catalyst Substrate Material: Ceramic honeycomb
  • Dimensions: 9.81 in. body length, 21.99 in. overall length
  • EO Number: Not applicable
  • Warranty: Magnaflow 25,000 Mile Limited Warranty
see more Fits the following 2004 Subaru Impreza submodels:
  • 4 Cyl 2.0L | WRX
  • 4 Cyl 2.5L | Outback, TS, RS, WRX STI
Magnaflow Catalytic Converter, Magnaflow OEM Grade (49-State) Direct Fit, Rear, 49-state Legal - No CA Shipments
$387.14 List Price $501.01 Save $113.87 Availability: In Stock
  • Free Ground Shipping
  • Low Price Guarantee
(

more

)
  • SKU#: M6649985
  • Product Fit: Direct Fit
  • Quantity Sold: Assembly
  • Tube Material: Stainless Steel
  • Anticipated Ship Out Time: 1-2 Business Days
  • Catalyst Substrate Material: Ceramic honeycomb
  • Dimensions: 29.63 in. overall length
  • EO Number: Not applicable
  • Warranty: Magnaflow 25,000 Mile Limited Warranty
see more Fits the following 2004 Subaru Impreza submodels:
  • 4 Cyl 2.0L | WRX

More results for 2004 Subaru Impreza Catalytic Converter

MAGNAFLOW 49-STATE LEGAL DIRECT FIT CATALYTIC CONVERTER
  • Not legal for use in California or in states adopting the California emissions standards
  • Easy bolt-on Installation with no cutting, welding or bending required
  • Stainless Steel Construction
  • Legendary... (see more)
MAGNAFLOW OEM GRADE (49-STATE LEGAL) SEMI-UNIVERSAL CATALYTIC CONVERTER
  • Not legal for use in California or in states adopting the California emissions standards
  • Designed for vehicles equipped with California emissions but not registered or driven in a state adopting... (see more)
MAGNAFLOW CALIFORNIA LEGAL SEMI-UNIVERSAL CATALYTIC CONVERTER
  • 50-State/California Legal
  • Semi-universal design – cut out your old catalytic converter and weld in the new one
  • Stainless Steel Construction
  • Legendary Magnaflow quality, power, and sound
  • Ceramic,... (see more)
DAVICO 49-STATE LEGAL - NO CA SHIPMENTS CATALYTIC CONVERTER

Davico Catalytic Converter

When it concerns choosing a solid brand name for your engine/exhaust system's catalytic converter, turn to Davico. Davico's line of original equipment quality replacement... (see more)

CATCO CATALYTIC CONVERTER (49-STATE LEGAL - NO CA SHIPMENTS)

Catco catalytic converters are designed with 409 stainless steel pipes and shell that guarantee the customers of durability and longer life.

Note:

  • 49-state legal; Not for sale or use in California;... (see more)
WALKER 49-STATE LEGAL - NO CA SHIPMENTS CATALYTIC CONVERTER

Walker catalytic converters feature OE style design and fit, thicker OE-quality flanges, oxygen sensor fittings, heat-shielded pipe, and structural brace for enhanced strength and... (see more)

BOSAL 49-STATE LEGAL - NO CA SHIPMENTS CATALYTIC CONVERTER

Bosal catalytic converters are made to fit vehicle-specific requirements for backpressure, emissions, sound levels, and sensors. They are designed and built for long life reliability.

Notes:

BENCHMARK 49-STATE LEGAL (NO CA) OE REPLACEMENT CATALYTIC CONVERTER

Benchmark catalytic converters are considered to be the industry's standard replacement catalytic converter. They are the recognized leading catalytic converters in terms of fitment and durability.... (see more)