Please check notes in each part listing to ensure the Catalytic Converter is correct for your 2004 NISSAN ALTIMA with a 3.5L 3498cc DOHC [VQ35DE] engine. EASTERN CATALYTIC CONVERTERS & WALKER are competing brands, and each brand's Catalytic Converter may be interchangeable. Special restrictions like "California only" or "with sport package" may indicate a Catalytic Converter fits only certain 2004 NISSAN ALTIMA models.

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After choosing a Catalytic Converter, click the "Add Part" button. Shipping costs will be shown on the Shopping Cart page. You may use your browser's Back button, or click on "Find More Parts", to find more Exhaust parts, other NISSAN ALTIMA parts, or parts for a different vehicle. Please try our Interactive Catalog (click red Start button above) for faster searching. Both catalogs use the same shopping cart, so any auto parts you've already chosen for your 2004 NISSAN will not be lost if you switch.