{"product_id":"shorty-exhaust-header-for-gmc-sierra-2007-2013-4-8l-5-3l-6-2l","title":"Shorty Exhaust Header for GMC Sierra (2007-2013) 4.8L 5.3L 6.2L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eHigh-Flow Stainless Shorty Exhaust Headers for 2007-2013 GMC Sierra (GMT900)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The Shorty Exhaust Header replaces the restrictive factory cast-iron exhaust manifolds on the 2007-2013 GMC Sierra to scavenge exhaust gases efficiently, reduce backpressure, and increase torque output across the mid-range powerband.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock GMC Sierra Manifold Failure Points \u0026amp; Exhaust Restrictions\u003c\/h3\u003e\n\u003cp\u003eFactory cast-iron manifolds on the \u003cstrong\u003eGMT900\u003c\/strong\u003e platform are notorious for exhaust leaks caused by sheared rear manifold bolts, warpage from uneven thermal cycles, and severe port restriction. The OEM log-style architecture forces adjacent cylinders to dump directly into a turbulent common plenum, creating excessive exhaust backpressure and cylinder heat retention. Over time, the combined stress of towing loads and engine vibration leads to cracked castings, blown flange gaskets, and degraded exhaust velocity on factory \u003cstrong\u003eGen IV Small Block\u003c\/strong\u003e engines.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThese shorty exhaust headers eliminate structural cracking and gas reversion by utilizing smooth-flowing 1.75-inch primary tubes in an 8-2 layout feeding into a 2 3\/8-inch collector outlet. Fabricated from heavy-gauge stainless steel with a high-luster 3-stage polish finish, the runners are joined with precision TIG and MIG welds to endure sustained exhaust gas temperatures. A heavy-duty 7\/16-inch CNC-machined cylinder head flange resists heat cycling distortion to prevent blowouts, while the 3\/8-inch collector flange guarantees a positive seal to downpipes. Integrated dual O2 sensor bungs allow plug-and-play installation without custom wiring or air-fuel monitoring errors.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2 Stainless Steel Exhaust Headers\u003c\/li\u003e\n  \u003cli\u003eExhaust Manifold 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;\"\u003e2007-2013 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 (LY2\/L20), Vortec 5300 (LH6\/LY5\/LMG\/LC9), Vortec 6200 (L92\/L9H) \/ 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;\"\u003e295-403 hp \/ 305-417 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;\"\u003eN\/A\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\u003e2007-2013 GMC Sierra 1500 4.8L V8\u003c\/li\u003e\n  \u003cli\u003e2007-2013 GMC Sierra 1500 5.3L V8\u003c\/li\u003e\n  \u003cli\u003e2007-2013 GMC Sierra 1500 6.2L 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 bolt-on fit for the 2007-2013 GMC Sierra equipped with the \u003cstrong\u003e4.8L\u003c\/strong\u003e, \u003cstrong\u003e5.3L\u003c\/strong\u003e, and \u003cstrong\u003e6.2L\u003c\/strong\u003e Gen IV V8 engines.\u003c\/p\u003e\n\n\u003ch4\u003eWill installing these shorty headers require an ECU tune?\u003c\/h4\u003e\n\u003cp\u003eNo, an ECU re-tune is not mandatory since primary oxygen sensor positions and factory collector locations are retained, though custom tuning maximizes gains.\u003c\/p\u003e\n\n\u003ch3\u003eThe GMC Heavy-Duty Hauling Caliber\u003c\/h3\u003e\n\u003cp\u003eEngineered to handle the high thermal stress of towing payloads and continuous hill climbs, these headers deliver the structural durability and uninhibited scavenging flow required to keep your Sierra running cool and strong under load.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67564817481976,"sku":"DS-ETEL5943E","price":179.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/shorty-exhaust-header-for-gmc-sierra-2007-2013-4-8l-5-3l-6-2l-1.jpg?v=1791049343","url":"https:\/\/performancechiptuning.com\/products\/shorty-exhaust-header-for-gmc-sierra-2007-2013-4-8l-5-3l-6-2l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}