{"product_id":"performance-engine-rebuild-re-ring-kit-for-gmc-sierra-1999-2013-4-8l-5-3l","title":"Performance Engine Rebuild Re-Ring Kit for GMC Sierra (1999-2013) 4.8L 5.3L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eHeavy-Duty Performance Engine Rebuild Re-Ring Kit for 1999-2013 GMC Sierra (GMT800 \/ GMT900)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The Performance Engine Rebuild Re-Ring Kit restores combustion sealing, corrects oil consumption, and refreshes the rotating assembly bearings on 1999-2013 GMC Sierra 4.8L and 5.3L V8 engines.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock GMC Sierra Ring Pack \u0026amp; Bearing Degradation\u003c\/h3\u003e\n\u003cp\u003eFactory \u003cstrong\u003eGen III\/IV Vortec\u003c\/strong\u003e small blocks frequently suffer from blow-by, ring-land carbon fouling, and loss of crankcase vacuum over extended service intervals. OEM graphite and single-layer gaskets break down under repeated thermal cycling, while standard bi-metal rod and main bearings develop micro-galling and low oil pressure conditions under sustained towing loads and high oil temperatures.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis master overhaul assembly addresses these vulnerabilities by pairing ductile-iron and moly-faced piston rings with premium tri-metal connecting rod and main bearings (\u003cstrong\u003eCB-663\u003c\/strong\u003e, \u003cstrong\u003eMS2199\u003c\/strong\u003e) for high-load durability. The package replaces leak-prone seals with Multi-Layer Steel (MLS) head gaskets engineered to withstand extreme cylinder pressures, viton-jacketed rear main and front timing cover seals, and high-temp fluoroelastomer valley pan and oil pan seals to guarantee zero oil weepage.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 Gen III Valley Cover Gasket 12558178\u003c\/li\u003e\n  \u003cli\u003e2 LS1\/LS2\/LS3 Header Gaskets\u003c\/li\u003e\n  \u003cli\u003e1 LS Oil Pan Gasket\u003c\/li\u003e\n  \u003cli\u003e2 LS Water Pump Gaskets\u003c\/li\u003e\n  \u003cli\u003e1 LS Front Cover Gasket\u003c\/li\u003e\n  \u003cli\u003e2 LS Valve Cover Gaskets\u003c\/li\u003e\n  \u003cli\u003e1 LS Damper Seal\u003c\/li\u003e\n  \u003cli\u003e1 LS Rear Cover Gasket\u003c\/li\u003e\n  \u003cli\u003e1 Rear Main Seal\u003c\/li\u003e\n  \u003cli\u003e4 Water Crossover\/Block Off Gaskets 12551933\u003c\/li\u003e\n  \u003cli\u003e1 Oil Filter Adapter Bypass Gasket 12611384\u003c\/li\u003e\n  \u003cli\u003e2 Knock Sensor Grommets 12558177\u003c\/li\u003e\n  \u003cli\u003e2 Multi-Layer Steel (MLS) Head Gaskets\u003c\/li\u003e\n  \u003cli\u003e1 Bolt Kit\u003c\/li\u003e\n  \u003cli\u003e1 Piston Rings Set\u003c\/li\u003e\n  \u003cli\u003e1 Main Bearings \u0026amp; Connecting Rod Bearings Set\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;\"\u003e1999-2013 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;\"\u003eVortec 4800 \/ 5300 (LR4, LM7, L59, LM4, L33, LY2, L20, LY5, LMG, LC9, LH6, LS4) \/ GMT800, GMT900\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;\"\u003e255-326 hp \/ 285-350 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;\"\u003e12558178, BTR73450, 12617944, 12612350, 12630223, 12633904, 12637683, 12585673, 12639249, 89060436, 12551933, 12611384, 12558177, 12622033, MS2199, CB-663, E-937K, 2M4978\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\u003e1999-2013 GMC Sierra 1500 4.8L V8\u003c\/li\u003e\n  \u003cli\u003e1999-2013 GMC Sierra 1500 5.3L 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 GMT800 \/ GMT900 Sierra?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 1999-2013 GMC Sierra equipped with 4.8L and 5.3L engines; \u003cstrong\u003episton rings will not fit 6.0L (LQ4, LQ9, LY6, L96) or 6.2L applications, and intake manifold gaskets are not included.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch4\u003eAre intake manifold gaskets included in this overhaul package?\u003c\/h4\u003e\n\u003cp\u003eNo, intake manifold gaskets are not included and must be sourced separately based on your specific cathedral or rectangular port intake configuration.\u003c\/p\u003e\n\n\u003ch3\u003eThe GMC Heavy-Duty Standard\u003c\/h3\u003e\n\u003cp\u003eBuilt to endure relentless payload demands and harsh thermal cycles, this rotating assembly overhaul kit delivers the structural integrity and high-torque sealing needed for heavy towing and severe fleet service.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67551519179000,"sku":"DS-EL2OZHH4T","price":188.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/performance-engine-rebuild-re-ring-kit-for-gmc-sierra-1999-2013-4-8l-5-3l-1.jpg?v=1790797965","url":"https:\/\/performancechiptuning.com\/products\/performance-engine-rebuild-re-ring-kit-for-gmc-sierra-1999-2013-4-8l-5-3l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}