{"product_id":"upper-intake-manifold-with-gasket-for-buick-lesabre-1996-2005-3-8l","title":"Upper Intake Manifold with Gasket for Buick LeSabre (1996-2005) 3.8L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eReinforced Upper Intake Manifold Plenum Kit for 1996-2005 Buick LeSabre (GM H-Body)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The upper intake manifold plenum kit replaces the failure-prone composite intake on the 1996-2005 LeSabre to resolve vacuum loss, stop internal coolant crossover leaks, and protect against catastrophic cylinder hydrolocking.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Buick LeSabre Plenum Failure\u003c\/h3\u003e\n\u003cp\u003eFactory \u003cstrong\u003eGM H-Body\u003c\/strong\u003e models equipped with the naturally aspirated \u003cstrong\u003e3800 Series II L36\u003c\/strong\u003e engine suffer from a documented material breakdown around the internal exhaust gas recirculation (EGR) passage. Continuous thermal cycling from the steel EGR stovepipe degrades the surrounding factory nylon polymer, causing the walls adjacent to the coolant metering ports to soften, warp, and crack. Once ruptured, pressurized coolant enters the intake charge path, leading to unmetered air infiltration, severe misfires, and catastrophic engine hydrolock.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis direct-fit upper intake plenum is manufactured from heat-stabilized, reinforced composite polymers engineered to withstand extreme thermal expansion and corrosive coolant chemistry. Upgraded port walls surround the EGR chimney to prevent thermal erosion, while rigid torque-limiting brass sleeves protect the flange against overtightening. Paired with high-recovery molded elastomer port gaskets and factory-spec throttle body hardware, this manifold assembly restores airtight vacuum balance and protects combustion chamber integrity under continuous engine load.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 Upper Intake Manifold Plenum (Reinforced Composite Plastic)\u003c\/li\u003e\n  \u003cli\u003e1 Upper Intake Manifold Port Gasket with Integrated Port Seals\u003c\/li\u003e\n  \u003cli\u003e1 Fuel Pressure Regulator Replacement Spring\u003c\/li\u003e\n  \u003cli\u003eThrottle Body Studs\u003c\/li\u003e\n  \u003cli\u003eReplacement O-Rings and Vacuum Fittings\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;\"\u003e1996-2005 Buick LeSabre\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;\"\u003e3.8L 3800 Series II L36 \/ GM H-Body\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;\"\u003e205 hp \/ 230 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;\"\u003e106001, 217454, 871601, 12537425, 24506013, 89017272, 89017274, CE1413044, FH10095, SK615180, XTA016, 615180, 11396399\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\u003e1996-2005 Buick LeSabre 3.8L Gas Naturally Aspirated V6 (Custom, Limited)\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 GM H-Body LeSabre?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 1996-2005 Buick LeSabre equipped with the naturally aspirated \u003cstrong\u003e3800 Series II L36\u003c\/strong\u003e 3.8L V6 engine. \u003cstrong\u003eDoes not fit supercharged 3.8L L67 engine variants or non-3.8L platforms.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch4\u003eWhat is the correct fastener torque specification?\u003c\/h4\u003e\n\u003cp\u003eInstall on a completely cold engine and torque all upper plenum bolts in the OEM criss-cross pattern to precisely 89 in-lb (10 Nm) to avoid uneven gasket crush or composite flange distortion.\u003c\/p\u003e\n\n\u003ch3\u003eThe Buick Reliability Standard\u003c\/h3\u003e\n\u003cp\u003eEngineered for sustained daily highway operation, this intake manifold assembly permanently eliminates factory thermal failure modes to ensure long-term domestic powertrain dependability.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":68038498091256,"sku":"DS-E1ZKEJG7R","price":99.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/upper-intake-manifold-with-gasket-for-buick-lesabre-1996-2005-3-8l-1.jpg?v=1794200714","url":"https:\/\/performancechiptuning.com\/es\/products\/upper-intake-manifold-with-gasket-for-buick-lesabre-1996-2005-3-8l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}