{"product_id":"catalytic-converter-for-gmc-sierra-2007-2008-4-3l-4-8l-5-3l-6-0l","title":"Catalytic Converter for GMC Sierra (2007-2008) 4.3L 4.8L 5.3L 6.0L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eDirect-Fit EPA-Compliant Catalytic Converter for 2007-2008 GMC Sierra (GMT900)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The direct-fit catalytic converter replaces clogged or degraded factory emissions units on the 2007-2008 GMC Sierra to restore exhaust velocity, eliminate catalyst efficiency trouble codes, and reduce tailpipe emissions.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock GMC Sierra Substrate Degradation \u0026amp; Flow Restriction\u003c\/h3\u003e\n\u003cp\u003eFactory catalytic converters on the \u003cstrong\u003eGMT900\u003c\/strong\u003e platform suffer from heat cycling, substrate erosion, and carbon fouling over prolonged duty cycles. As mileage accumulates on the \u003cstrong\u003eVortec\u003c\/strong\u003e engine platform, combustion byproducts contaminate the washcoat, causing precious metal sintering and reduced catalytic reduction efficiency. This failure mode triggers persistent \u003cstrong\u003eP0420\u003c\/strong\u003e and \u003cstrong\u003eP0430\u003c\/strong\u003e diagnostic trouble codes, produces higher exhaust backpressure, spikes exhaust gas temperatures, and robs the powertrain of towing capability and torque under load.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eConstructed from a corrosion-resistant \u003cstrong\u003estainless steel\u003c\/strong\u003e outer shell, this direct-replacement unit features a high-flow ceramic substrate formulated with a balanced washcoat for optimal emissions conversion. The manifold-to-converter geometry matches factory blueprints, integrating a 3-bolt welded flange and a 3-bolt loose spherical flare inlet alongside a 2-bolt welded outlet. Integrated post-catalyst sensor ports ensure accurate closed-loop signaling to the ECM, while the clamp-on configuration preserves exhaust scavenging without requiring custom pipe fabrication or cutting.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 x Direct-fit catalytic converter assembly\u003c\/li\u003e\n  \u003cli\u003eMounting bolts and installation hardware\u003c\/li\u003e\n  \u003cli\u003eFlange seal\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;\"\u003e2007-2008 GMC Sierra\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;\"\u003e4.3L (LU3), 4.8L (LY2), 5.3L (LY5\/LMG\/LC9\/LH6), 6.0L (L76\/LY6) \/ \u003cstrong\u003eGMT900\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;\"\u003e195–367 hp \/ 260–375 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\u003e50469\u003c\/strong\u003e, \u003cstrong\u003e50450\u003c\/strong\u003e, \u003cstrong\u003e645459\u003c\/strong\u003e, \u003cstrong\u003e301-1802\u003c\/strong\u003e, \u003cstrong\u003e49194\u003c\/strong\u003e, \u003cstrong\u003e9233\u003c\/strong\u003e, \u003cstrong\u003e079-5218\u003c\/strong\u003e, \u003cstrong\u003eGM20382\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\u003e2007-2008 GMC Sierra 1500 4.3L V6\u003c\/li\u003e\n  \u003cli\u003e2007-2008 GMC Sierra 1500 4.8L V8\u003c\/li\u003e\n  \u003cli\u003e2007-2008 GMC Sierra 1500 5.3L V8\u003c\/li\u003e\n  \u003cli\u003e2007-2008 GMC Sierra 1500 6.0L V8\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 GMT900 Sierra?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 2007-2008 GMC Sierra equipped with the 4.3L, 4.8L, 5.3L, and 6.0L \u003cstrong\u003eVortec\u003c\/strong\u003e engines. \u003cstrong\u003eThis is an EPA-compliant 48-state converter and cannot be shipped to or registered in California, Colorado, New York, or Maine.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch4\u003eDo I need to weld this converter during installation?\u003c\/h4\u003e\n\u003cp\u003eNo, this unit is engineered for bolt-on and clamp-on installation using original exhaust hanger geometry and factory flange interfaces.\u003c\/p\u003e\n\n\u003ch3\u003eThe GMC Heavy-Duty Caliber\u003c\/h3\u003e\n\u003cp\u003eEngineered to handle the high thermal stress of towing, hauling, and daily work environments, this converter provides the flow dynamics and durability expected of a full-size truck exhaust component.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67901669736696,"sku":"DS-EUI84NDR2","price":228.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/catalytic-converter-for-gmc-sierra-2007-2008-4-3l-4-8l-5-3l-6-0l-1.jpg?v=1793340367","url":"https:\/\/performancechiptuning.com\/es\/products\/catalytic-converter-for-gmc-sierra-2007-2008-4-3l-4-8l-5-3l-6-0l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}