{"product_id":"catalytic-converter-for-toyota-tundra-2003-2004-4-7l-left-right","title":"Catalytic Converter for Toyota Tundra (2003-2004) 4.7L Left \u0026 Right","description":"\u003ch2\u003eDirect-Fit Catalytic Converter Set for 2003-2004 Toyota Tundra\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The Left \u0026amp; Right Catalytic Converter Set replaces degraded factory emissions units on the 2003-2004 Toyota Tundra to restore proper exhaust gas scavenging, eliminate catalyst efficiency trouble codes, and ensure federal emissions compliance.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Toyota Tundra Exhaust Degradation and Failure Points\u003c\/h3\u003e\n\u003cp\u003eFactory catalytic converters on the first-generation \u003cstrong\u003eXK30\/XK40\u003c\/strong\u003e platform are notorious for substrate deterioration after years of thermal cycling and heavy hauling duty. Operating behind the high-displacement \u003cstrong\u003e2UZ-FE\u003c\/strong\u003e V8, original internal washcoats suffer chemical deactivation, leading to restricted exhaust backpressure, reduced fuel economy, and recurring P0420\/P0430 diagnostic trouble codes. Furthermore, factory pipe-to-flange welds frequently develop stress fractures due to chassis flex and continuous vibration under load, causing unmetered exhaust leaks upstream of the secondary oxygen sensors.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eEngineered as a pair of precision bolt-on assemblies, this direct-fit system restores factory exhaust velocity without requiring cutting or custom welding. The units feature heavy-gauge, corrosion-resistant stainless steel outer shells designed to endure severe road salt and gravel abrasion. Internally, a dense, high-flow ceramic substrate is washcoated with active precious metals to efficiently convert hydrocarbons (HC), carbon monoxide (CO), and nitrogen oxides (NOx) into benign compounds. Laser-cut mounting flanges and reinforced exhaust hanger brackets ensure leak-free seal integrity against the cylinder head downpipes and mid-pipe connections, maintaining ideal pre- and post-catalyst oxygen sensor feedback.\u003c\/p\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable width=\"100%\" style=\"border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px; margin-bottom: 20px;\"\u003e\n  \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eFitment\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e2003-2004 Toyota Tundra\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eEngine \/ Chassis\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e2UZ-FE \/ XK30, XK40\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eStock Output\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e245 hp \/ 315 lb-ft\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eReplaces OEM Part #\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003eN\/A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2003 Toyota Tundra Base, SR5, Limited (4.7L V8 - Left \u0026amp; Right)\u003c\/li\u003e\n  \u003cli\u003e2004 Toyota Tundra Base, SR5, Limited (4.7L V8 - Left \u0026amp; Right)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this fit the XK30\/XK40 Tundra?\u003c\/strong\u003e\u003cbr\u003e Yes, this is a direct fit for the 2003-2004 Toyota Tundra equipped with the \u003cstrong\u003e2UZ-FE\u003c\/strong\u003e engine.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill this converter set resolve check engine lights related to catalyst efficiency?\u003c\/strong\u003e\u003cbr\u003e Provided upstream oxygen sensors and fueling systems function within spec, this EPA-compliant assembly eliminates P0420 and P0430 DTCs.\u003c\/p\u003e\n\n\u003ch3\u003eThe Toyota Truck Durability Standard\u003c\/h3\u003e\n\u003cp\u003eBuilt for the structural and thermal demands of the legendary 4.7L V8, this converter assembly restores critical low-end torque and exhaust flow to maintain the heavy-duty towing, hauling, and off-road reliability expected of the early Tundra platform.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":50502192922872,"sku":"DS-EJ8VR01PL","price":369.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/catalytic-converter-for-toyota-tundra-2003-2004-4-7l-left-right-1.jpg?v=1789339042","url":"https:\/\/performancechiptuning.com\/fr\/products\/catalytic-converter-for-toyota-tundra-2003-2004-4-7l-left-right","provider":"Performance Chip Tuning","version":"1.0","type":"link"}