{"product_id":"catalytic-converter-for-gmc-sonoma-1996-1999-2-2l-rear","title":"Catalytic Converter for GMC Sonoma (1996-1999) 2.2L Rear","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eDirect-Fit Rear Catalytic Converter for 1996-1999 GMC Sonoma (GMT325)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The rear catalytic converter replaces the degraded downstream catalyst assembly on the 1996-1999 GMC Sonoma 2.2L to clear OBD-II catalyst efficiency trouble codes, eliminate exhaust backpressure, and restore emissions compliance.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock GMC Sonoma Substrate Degradation\u003c\/h3\u003e\n\u003cp\u003eThe factory catalytic converter on the second-generation \u003cstrong\u003eGMT325\u003c\/strong\u003e Sonoma frequently suffers from thermal fatigue and substrate breakdown over high mileage cycles. The aging ceramic monolith in the factory \u003cstrong\u003eLN2 (Vortec 2200)\u003c\/strong\u003e exhaust stream experiences washcoat sintering and physical wash-out, resulting in persistent P0420 efficiency codes. Furthermore, structural collapse or carbon glazing inside the original converter core chokes exhaust scavenging, generating excessive backpressure that causes rough idle, elevated cylinder head temperatures, and noticeable top-end power loss.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis replacement converter is fabricated using a heavy-gauge 409 stainless steel housing designed to resist road-salt corrosion and mechanical stress. Inside, a high-cell-density 600 CPSI cordierite ceramic substrate is loaded with a high-activity washcoat of palladium and rhodium precious metals to maximize chemical conversion efficiency of hydrocarbons, CO, and NOx. Smooth mandrel-bent inlet and outlet tubing preserves laminar exhaust gas velocity, while precision-machined flanges mate cleanly to the factory exhaust layout. Factory-located O2 sensor bungs allow factory downstream sensors to thread directly in without wiring harness modifications or bung extensions.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 Catalytic Converter (Rear)\u003c\/li\u003e\n  \u003cli\u003eMounting hardware\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: 1px solid #e0e0e0; font-size: 14px; min-width: 300px;\"\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;\"\u003e1996-1999 GMC Sonoma\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\u003e2.2L LN2\u003c\/strong\u003e \/ \u003cstrong\u003eGMT325\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;\"\u003e120 hp \/ 140 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\u003e25175249\u003c\/strong\u003e, \u003cstrong\u003e25314443\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\u003e1996-1999 GMC Sonoma 2.2L L4 (Gasoline)\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 GMT325 Sonoma?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 1996-1999 GMC Sonoma equipped with the \u003cstrong\u003eLN2 2.2L\u003c\/strong\u003e inline-four; this unit is not legal for sale, purchase, or operation in California, Colorado, New York, or Maine, and does not fit 4.3L V6 models.\u003c\/p\u003e\n\n\u003ch4\u003eIs welding or pipe cutting required for installation?\u003c\/h4\u003e\n\u003cp\u003eNo, this unit is engineered as a true bolt-on direct replacement using OEM-spec flanges and included mounting hardware.\u003c\/p\u003e\n\n\u003ch3\u003eThe GMC Workhorse Standard\u003c\/h3\u003e\n\u003cp\u003eMaintain your compact truck's daily hauling reliability and smooth drivability by restoring factory exhaust flow velocity and clean emissions operation.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67901438099704,"sku":"DS-EGGTRM06M","price":89.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/catalytic-converter-for-gmc-sonoma-1996-1999-2-2l-rear-1.jpg?v=1793336361","url":"https:\/\/performancechiptuning.com\/de\/products\/catalytic-converter-for-gmc-sonoma-1996-1999-2-2l-rear","provider":"Performance Chip Tuning","version":"1.0","type":"link"}