{"product_id":"upper-intake-manifold-with-gasket-for-oldsmobile-eighty-eight-1995-1999-3-8l","title":"Upper Intake Manifold with Gasket for Oldsmobile Eighty-Eight (1995-1999) 3.8L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eDirect-Replacement Upper Intake Manifold with Gasket for 1995-1999 Oldsmobile Eighty-Eight (H-Body)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The Upper Intake Manifold with Gasket replaces the failure-prone factory composite plenum on the 1995-1999 Eighty-Eight to eliminate unmetered vacuum leaks and stop internal coolant migration into the cylinders.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Oldsmobile Eighty-Eight EGR Thermal Degradation\u003c\/h3\u003e\n\u003cp\u003eFactory \u003cstrong\u003eGM 3800 Series II\u003c\/strong\u003e composite upper plenums on the \u003cstrong\u003eH-Body\u003c\/strong\u003e platform suffer a notorious engineering vulnerability directly adjacent to the exhaust gas recirculation (EGR) passage. The unshielded factory composite plastic cannot tolerate repetitive high-temperature thermal cycling from exhaust gas flow through the internal stovepipe. Over time, heat soak degrades and thins the nylon manifold wall bordering the coolant crossover passage, ultimately cracking the plenum chamber. This failure introduces engine coolant directly into the intake tract, resulting in severe misfires, vacuum loss, catalytic converter damage, or catastrophic hydrostatic lock.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis replacement upper intake manifold is molded from high-grade, heat-stabilized reinforced nylon polymer engineered to resist prolonged thermal fatigue and EGR port degradation. The intake runner geometry is precision-molded to match factory airflow profiles, ensuring balanced volumetric efficiency across all intake ports without causing diagnostic trouble codes. Supplied with an integrated port seal gasket kit, upgraded throttle body studs, O-rings, and a fuel pressure regulator spring, this direct-fit solution replaces OEM reference \u003cstrong\u003e89017274\u003c\/strong\u003e and restores manifold vacuum integrity, intake pressure retention, and structural resistance against coolant intrusion.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 Upper Intake Manifold (plastic)\u003c\/li\u003e\n  \u003cli\u003e1 Upper Intake Manifold Gasket with port seals\u003c\/li\u003e\n  \u003cli\u003eFuel pressure regulator spring\u003c\/li\u003e\n  \u003cli\u003eThrottle body studs\u003c\/li\u003e\n  \u003cli\u003eO-rings and fittings as pictured\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;\"\u003e1995-1999 Oldsmobile Eighty-Eight\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;\"\u003e3800 Series II (3.8L V6) \/ 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\u003e1995-1999 Oldsmobile Eighty-Eight 3.8L Gas Naturally Aspirated\u003c\/li\u003e\n  \u003cli\u003e1995 Oldsmobile Eighty-Eight 3.8L Gas Supercharged\u003c\/li\u003e\n  \u003cli\u003e1996-1999 Oldsmobile Eighty-Eight LSS 3.8L Gas Naturally Aspirated\u003c\/li\u003e\n  \u003cli\u003e1996-1999 Oldsmobile Eighty-Eight LSS 3.8L Gas Supercharged\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 H-Body Eighty-Eight?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 1995-1999 Oldsmobile Eighty-Eight equipped with the \u003cstrong\u003e3800 Series II\u003c\/strong\u003e engine. \u003cstrong\u003eOnly the 3.8L V6 applications listed are covered; do not use on non-3800 platforms.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch4\u003eWhat torque sequence and procedure should be followed during installation?\u003c\/h4\u003e\n\u003cp\u003eTorque all intake manifold fasteners strictly to factory GM specifications in the prescribed crisscross sequence on a completely cold engine to prevent warping the composite flange.\u003c\/p\u003e\n\n\u003ch3\u003eThe Oldsmobile Reliability Standard\u003c\/h3\u003e\n\u003cp\u003eThe legendary GM 3800 Series II V6 delivers proven long-term highway reliability when its critical composite intake components are maintained. Installing this reinforced upper manifold assembly preserves factory intake plenum pressure, protects internal engine components from coolant ingestion, and guarantees lasting operational stability for your classic cruiser.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":68038549537016,"sku":"DS-E3APJ04JZ","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-oldsmobile-eighty-eight-1995-1999-3-8l-1.jpg?v=1794201094","url":"https:\/\/performancechiptuning.com\/products\/upper-intake-manifold-with-gasket-for-oldsmobile-eighty-eight-1995-1999-3-8l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}