{"product_id":"catalytic-converter-for-lexus-rx-1999-2003-3-0l-front-center-rear","title":"Catalytic Converter for Lexus RX (1999-2003) 3.0L Front Center \u0026 Rear","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eDirect-Fit EPA Catalytic Converter Set for 1999-2003 Lexus RX (MCU10\/MCU15)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The complete catalytic converter set replaces the aged front, center, and rear emission units on the 1999-2003 Lexus RX300 to restore exhaust scavenging, eliminate P0420\/P0430 efficiency trouble codes, and ensure federal emissions compliance.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Lexus RX Catalyst Deterioration\u003c\/h3\u003e\n\u003cp\u003eOver extended operating cycles, the factory ceramic monoliths in the \u003cstrong\u003eMCU10\u003c\/strong\u003e and \u003cstrong\u003eMCU15\u003c\/strong\u003e exhaust system succumb to thermal fatigue, hydrocarbon wash coat sintering, and oil contamination typical of high-mileage \u003cstrong\u003e1MZ-FE\u003c\/strong\u003e powerplants. This internal degradation restricts exhaust gas evacuation, elevating exhaust manifold backpressure, blunting throttle response, and triggering persistent catalyst system efficiency trouble codes (P0420\/P0430) at the post-cat oxygen sensors.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis 3-piece complete assembly replaces the entire exhaust emission line utilizing heavy-gauge, corrosion-resistant stainless steel housings packed with high-flow wash-coated ceramic honeycombs. Precision-aligned, 2-bolt welded flanges duplicate factory takeoff geometry for leak-free, bolt-in exhaust manifold and mid-pipe alignment. Internal cell density is calibrated to maximize surface contact with exhaust gasses, optimizing NOx, CO, and hydrocarbon reduction while lowering overall exhaust backpressure compared to plugged stock units.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 Front Catalytic Converter (Part # 16191)\u003c\/li\u003e\n  \u003cli\u003e1 Center Catalytic Converter with Gasket Stub (Part # 641174)\u003c\/li\u003e\n  \u003cli\u003e1 Rear Catalytic Converter (Part # 16121)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; margin-bottom: 20px;\"\u003e\n  \u003ctable width=\"100% style=\" border-collapse: collapse border: solid font-size: min-width:\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;\"\u003e1999-2003 Lexus RX\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;\"\u003e\n\u003cstrong\u003e1MZ-FE\u003c\/strong\u003e \/ \u003cstrong\u003eMCU10 \/ MCU15\u003c\/strong\u003e\n\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;\"\u003e220 hp \/ 222 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;\"\u003e\n\u003cstrong\u003e16191\u003c\/strong\u003e, \u003cstrong\u003e641174\u003c\/strong\u003e, \u003cstrong\u003e16121\u003c\/strong\u003e, \u003cstrong\u003e40236\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1999-2003 Lexus RX300 Base 3.0L V6 Gas (FWD - MCU10)\u003c\/li\u003e\n  \u003cli\u003e1999-2003 Lexus RX300 Base 3.0L V6 Gas (AWD - MCU15)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions \u0026amp; Fitment Warnings\u003c\/h3\u003e\n\u003ch4\u003eDoes this fit the MCU10\/MCU15 RX?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 1999-2003 Lexus RX equipped with the \u003cstrong\u003e1MZ-FE\u003c\/strong\u003e 3.0L V6 engine; \u003cstrong\u003eit is not legal for sale or use in California, Colorado, New York, or Maine.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch4\u003eShould downstream oxygen sensors be renewed during installation?\u003c\/h4\u003e\n\u003cp\u003eYes, replacing pre- and post-cat oxygen sensors and resolving any existing cylinder misfires or air-fuel trim imbalances is strictly required to prevent instantaneous contamination of the new ceramic substrates.\u003c\/p\u003e\n\n\u003ch3\u003eThe Lexus Engineering Standard\u003c\/h3\u003e\n\u003cp\u003eEngineered to Japanese luxury-utility vehicle standards, this complete stainless steel assembly restores the smooth, whisper-quiet cabin acoustics and refined low-end torque delivery expected of the first-generation Lexus RX.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67592006861048,"sku":"DS-E2LKE4H2Y","price":186.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/catalytic-converter-for-lexus-rx-1999-2003-3-0l-front-center-rear-2.webp?v=1791396133","url":"https:\/\/performancechiptuning.com\/es\/products\/catalytic-converter-for-lexus-rx-1999-2003-3-0l-front-center-rear","provider":"Performance Chip Tuning","version":"1.0","type":"link"}