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Catalytic Converter for 2003 Isuzu Ascender

We have 10 Items In-stock. Select your vehicle's Submodel to continue.

Eastern 50-state legal Catalytic Converter

Eastern ECO CARB Catalytic Converter

 30 years of innovation is proof enough that Eastern is the best manufacturer of the finest aftermarket and original equipment catalytic converters on the market. Their ECO Series Catalytic Converters which are designed to help keep the Check Engine Light (MIL) off is another set of catalytic converters with world class quality.

 The Eastern ECO CARB Catalytic Converter is the best option for any vehicle that needs to comply with the California Air Resources Board (CARB) regulations. The Eastern ECO CARB Catalytic Converter features washcoats with greater loadings of precious metals to handle applications with ultra low emissions, higher than normal emissions, as well as vehicles with higher mileage and heavier workloads.

Here's why Eastern ECO CARB Catalytic Converter is the best option:

  •   Passed the emissions requirement of the California Air Resources Board
  •   Engineered with Eastern's proprietary NANO technology yielding highly efficient loadings for lower cost and better converter efficiency
  •   Features an advanced materials design for maximum engine output and performance
  •   Comes with a 5-year or 50,000-mile warranty
Eastern Catalytic Converter, Eastern ECO CARB, Center, Traditional Converter
$166.35 List Price $196.29 Save $29.94 Availability: In Stock
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  • SKU#: EAST865018
  • Emissions: 50-State Legal
  • Product Fit: Semi-Universal
  • Quantity Sold: Sold Individually
  • Tube Material: Aluminized Steel
  • Anticipated Ship Out Time: 1-2 Business Days
  • EO Number: D-665-14
  • Warranty: 5-year or 50,000-mile Eastern limited warranty
see more Fits the following 2003 Isuzu Ascender submodels:
  • 6 Cyl 4.2L | Base, LS, Limited
Eastern Catalytic Converter, Eastern ECO CARB, Center, Traditional Converter
$157.06 List Price $185.33 Save $28.27 Availability: In Stock
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  • SKU#: EAST640003
  • Emissions: 50-State Legal
  • Product Fit: Semi-Universal
  • Quantity Sold: Sold Individually
  • Tube Material: Aluminized Steel
  • Anticipated Ship Out Time: 1-2 Business Days
  • EO Number: D-665-17
  • Warranty: 5-year or 50,000-mile Eastern limited warranty
see more Fits the following 2003 Isuzu Ascender submodels:
  • 6 Cyl 4.2L | Base, LS, Limited
  • 8 Cyl 5.3L | Base, LS, Limited
Eastern Catalytic Converter, Eastern ECO CARB, Center, Traditional Converter
$163.91 List Price $193.41 Save $29.50 Availability: In Stock
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  • SKU#: EAST640012
  • Emissions: 50-State Legal
  • Product Fit: Semi-Universal
  • Quantity Sold: Sold Individually
  • Tube Material: Aluminized Steel
  • Anticipated Ship Out Time: 1-2 Business Days
  • EO Number: D-665-18
  • Warranty: 5-year or 50,000-mile Eastern limited warranty
see more Fits the following 2003 Isuzu Ascender submodels:
  • 6 Cyl 4.2L | Base, LS, Limited
  • 8 Cyl 5.3L | Base, LS, Limited

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, honeycomb catalyst designed for maximum flow and surface area

When you want the best, you want Magnaflow!  These semi-universal 50-State Legal 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 50-State Semi-Universal, Traditional Converter, 50-State Legal
$195.89 List Price $253.51 Save $57.62 Availability: In Stock
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  • SKU#: M6645006
  • Product Fit: Semi-Universal
  • Quantity Sold: Sold Individually
  • Tube Material: Stainless Steel
  • Anticipated Ship Out Time: 1-2 Business Days
  • Dimensions: 16 in. overall length
  • EO Number: D-193-66, D-193-91
  • Notes: Inlet/Outlet Size : 2.5in. I.D.
  • Warranty: Magnaflow 5 year / 50,000 Mile Warranty
see more Fits the following 2003 Isuzu Ascender submodels:
  • 6 Cyl 4.2L | Base, LS, Limited
  • 8 Cyl 5.3L | Base, LS, Limited
Rating: (see review/s)

"Had these installed along with two Magnaflow mufflers and the exhaust sounds great, even the engine tem was reduced due to the free flowing exhaust." posted by: on September 4, 2009

Magnaflow Catalytic Converter, Magnaflow 50-State Semi-Universal, Traditional Converter, 50-State Legal
$201.48 List Price $260.73 Save $59.25 Availability: In Stock
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  • SKU#: M66445006
  • Product Fit: Semi-Universal
  • Quantity Sold: Sold Individually
  • Tube Material: Stainless Steel
  • Anticipated Ship Out Time: 1-2 Business Days
  • Dimensions: 16 in. overall length
  • EO Number: D-193-100
  • Notes: Oval body; Inlet/Outlet Size : 2.5in. I.D.
  • Warranty: Magnaflow 5 year / 50,000 Mile Warranty
see more Fits the following 2003 Isuzu Ascender submodels:
  • 6 Cyl 4.2L | Base, LS, Limited
  • 8 Cyl 5.3L | Base, LS, Limited

Walker 50-state legal 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 durability.

Features:

  • Higher loaded substrate
  • Easy bolt-on installation

Notes:

  • 50-state legal
  • Minor modifications required
Walker Catalytic Converter, Walker CalCat, Center, Traditional Converter
$191.39 List Price $417.14 Save $225.75 Availability: In Stock
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  • SKU#: WK82303
  • Emissions: 50-State Legal
  • Product Fit: Semi-Universal
  • Quantity Sold: Sold Individually
  • Tube Material: Stainless Steel
  • Anticipated Ship Out Time: 1-2 Business Days
  • EO Number: D-182-51
  • Warranty: 5-year or 50,000-mile Walker limited warranty
see more Fits the following 2003 Isuzu Ascender submodels:
  • 6 Cyl 4.2L | Base, LS, Limited

Flowmaster 50-State Legal Semi-Universal Catalytic Converter

FLOWMASTER – 50 STATE LEGAL SEMI-UNIVERSAL CATALYTIC CONVERTER

Failed the smog test because of a malfunctioning stock catalytic converter that has come to the end of its life? Don’t panic and send your vehicle off to the junkyard when everything else is running smoothly. Replace that old catalytic converter with a new Flowmaster 50 State Semi-Universal Catalytic Converter and go back in for a retest. Since installing a new converter from any car dealer is exceedingly expensive, using a Flowmaster is a much better alternative. After installing a Flowmaster 50 State Legal Semi-Universal Catalytic Converter, your car, truck or SUV will have a much better chance of passing the smog test and it will not trip check engine lights as well. Flowmaster known as ‘the exhaust technology company,’ is a leading manufacturer of high performance exhaust systems and respected for design, innovation and engineering.

  • Great for replacing worn out factory original catalytic converters
  • Designed and manufactured in U.S.A.
  • Meticulously engineered internals with the correct precious metals won’t set off check engine lights
  • Mandatory in all states that adopted strict California vehicle emission standards
  • All California Air Resources Board (CARB) requirements are met
  • Catalyst housing is made from stainless steel for longevity
  • Made for a wide selection of popular trucks, SUVs and cars

NOTE: Requires clamps, welding or custom fabrication to install

Flowmaster Catalytic Converter, Flowmaster 50-State Legal, Traditional Converter, 50-State Legal
$211.00 List Price $273.06 Save $62.06 Availability: In Stock
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  • SKU#: F133912025
  • Product Fit: Semi-Universal
  • Quantity Sold: Sold Individually
  • Tube Material: Stainless Steel
  • Anticipated Ship Out Time: 1-2 Business Days
  • EO Number: D-280-101
  • Warranty: 5-Year Or 50,000-Mile Flowmaster Warranty On Exterior Casings
see more Fits the following 2003 Isuzu Ascender submodels:
  • 6 Cyl 4.2L | Base, LS, Limited
  • 8 Cyl 5.3L | Base, LS, Limited
Flowmaster Catalytic Converter, Flowmaster 50-State Legal, Traditional Converter, 50-State Legal
$266.00 List Price $344.24 Save $78.24 Availability: In Stock
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  • SKU#: F133910124
  • Product Fit: Semi-Universal
  • Quantity Sold: Sold Individually
  • Tube Material: Stainless Steel
  • Anticipated Ship Out Time: 1-2 Business Days
  • EO Number: D-280-101
  • Warranty: 5-Year Or 50,000-Mile Flowmaster Warranty On Exterior Casings
see more Fits the following 2003 Isuzu Ascender submodels:
  • 6 Cyl 4.2L | Base, LS, Limited
Flowmaster Catalytic Converter, Flowmaster 50-State Legal, Traditional Converter, 50-State Legal
$211.00 List Price $273.06 Save $62.06 Availability: In Stock
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  • SKU#: F133912024
  • Product Fit: Semi-Universal
  • Quantity Sold: Sold Individually
  • Tube Material: Stainless Steel
  • Anticipated Ship Out Time: 1-2 Business Days
  • EO Number: D-280-101
  • Warranty: 5-Year Or 50,000-Mile Flowmaster Warranty On Exterior Casings
see more Fits the following 2003 Isuzu Ascender submodels:
  • 6 Cyl 4.2L | Base, LS, Limited
  • 8 Cyl 5.3L | Base, LS, Limited

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:

  • 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
Bosal Catalytic Converter, Center, Traditional Converter, 48-State Legal (Cannot Ship To CA Or NY)
$246.65 List Price $291.05 Save $44.40 Availability: In Stock
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  • SKU#: BO0795175
  • Product Fit: Direct Fit
  • Quantity Sold: Assembly
  • Tube Material: Aluminized Steel
  • Anticipated Ship Out Time: 1-2 Business Days
  • Dimensions: 56 in. L x 26 in. W x 11 in. H
  • Replaces OE Number: 15155245, 15216000
  • Warranty: 5-year or 25,000-mile Bosal limited warranty
see more Fits the following 2003 Isuzu Ascender submodels:
  • 6 Cyl 4.2L | Base, Limited, LS