{"product_id":"performance-head-gasket-kit-for-chevrolet-express-2004-2008-4-8l-5-3l","title":"Performance Head Gasket Kit for Chevrolet Express (2004-2008) 4.8L 5.3L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eHeavy-Duty Multi-Layer Steel Head Gasket Kit for 2004-2008 Chevrolet Express (GMT610)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The Multi-Layer Steel Head Gasket Kit seals the cylinder head deck, oil passages, and coolant passages on the 2004-2008 Chevrolet Express to prevent combustion leaks and maintain factory cylinder compression.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Chevrolet Express Gasket Degradation\u003c\/h3\u003e\n\u003cp\u003eUnder continuous commercial payload duty and severe heat cycling, OEM composite gaskets on the \u003cstrong\u003eGMT610\u003c\/strong\u003e platform suffer fire-ring deterioration and combustion flange distortion. High-mileage \u003cstrong\u003eVortec 4800\u003c\/strong\u003e and \u003cstrong\u003eVortec 5300\u003c\/strong\u003e cast-iron blocks with aluminum cylinder heads develop micro-fretting along the mating deck, resulting in external coolant weepage, combustion gas intrusion into the cooling jacket, and catastrophic cross-contamination of engine oil.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis full overhaul kit features Multi-Layer Steel (\u003cstrong\u003eMLS\u003c\/strong\u003e) head gaskets engineered with high-recovery spring steel layers coated in high-temperature Viton elastomer. This construction withstands extreme cylinder combustion pressures and accommodates head lift under heavy towing. Matched with molded fluoroelastomer valve stem seals, precision intake\/exhaust manifold gaskets, and an elastomeric valley cover seal, this direct-fit overhaul restores critical deck sealing integrity across high thermal loads.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2 Multi-Layer Steel (MLS) Head Gaskets\u003c\/li\u003e\n  \u003cli\u003e1 Rear Crankshaft Gasket Seal\u003c\/li\u003e\n  \u003cli\u003e1 Engine Oil Pan Gasket\u003c\/li\u003e\n  \u003cli\u003e1 Valley Cover Gasket\u003c\/li\u003e\n  \u003cli\u003eIntake Manifold Gaskets\u003c\/li\u003e\n  \u003cli\u003eExhaust Manifold Gaskets\u003c\/li\u003e\n  \u003cli\u003eKnock Sensor Grommets\u003c\/li\u003e\n  \u003cli\u003eDamping Plug Heads\u003c\/li\u003e\n  \u003cli\u003eValve Stem Seals\u003c\/li\u003e\n  \u003cli\u003eFiber Base Plates\u003c\/li\u003e\n  \u003cli\u003eAncillary O-Rings and Hardware Gaskets\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;\"\u003e2004-2008 Chevrolet Express\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;\"\u003e4.8L (LR4\/LY2) \u0026amp; 5.3L (LM7\/LMF) Vortec V8 \/ GMT610\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;\"\u003e275-295 hp \/ 290-335 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;\"\u003eCS9284, HS26191PT, HS26190PT-2, HS26191PT-1, HGS3168, ES72220, GS33449, HSGM10448L, LGS3165, MIS16340\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\u003e2004-2008 Chevrolet Express 1500 5.3L V8\u003c\/li\u003e\n  \u003cli\u003e2004-2008 Chevrolet Express 2500 4.8L \/ 5.3L V8\u003c\/li\u003e\n  \u003cli\u003e2004-2008 Chevrolet Express 3500 4.8L 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 GMT610 Express?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 2004-2008 Chevrolet Express equipped with the \u003cstrong\u003e4.8L\u003c\/strong\u003e or \u003cstrong\u003e5.3L\u003c\/strong\u003e Gen III\/IV Vortec small block V8 engine. \u003cstrong\u003eExcludes 4.3L V6, 6.0L V8, and 6.6L Duramax diesel engine variants.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch4\u003eAre cylinder head bolts and piston rings included?\u003c\/h4\u003e\n\u003cp\u003eNo, piston rings are not included in this gasket set, and new torque-to-yield (TTY) cylinder head bolts must be sourced separately for reassembly.\u003c\/p\u003e\n\n\u003ch3\u003eThe Chevrolet Fleet Durability Standard\u003c\/h3\u003e\n\u003cp\u003eEngineered for high-demand commercial hauling and commercial fleet uptime, this full overhaul set provides the thermal and shear resilience required to keep high-GVWR Express vans operating leak-free under sustained towing loads.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67551498338552,"sku":"DS-EP0OWSE44","price":89.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/performance-head-gasket-kit-for-chevrolet-express-2004-2008-4-8l-5-3l-1.jpg?v=1790797666","url":"https:\/\/performancechiptuning.com\/es\/products\/performance-head-gasket-kit-for-chevrolet-express-2004-2008-4-8l-5-3l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}