{"product_id":"upper-intake-manifold-with-gasket-for-pontiac-bonneville-1995-2005-3-8l","title":"Upper Intake Manifold with Gasket for Pontiac Bonneville (1995-2005) 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 1995-2005 Pontiac Bonneville (H-Body \/ G-Body)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The upper intake manifold kit replaces the failure-prone factory plenum on the 1995-2005 Pontiac Bonneville to restore airtight manifold absolute pressure (MAP) seals and prevent catastrophic engine coolant ingestion.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Pontiac Bonneville Intake Plenum Weakness\u003c\/h3\u003e\n\u003cp\u003eThe factory nylon composite upper plenum on the \u003cstrong\u003eGM 3800 Series II\u003c\/strong\u003e engine features a critical design flaw adjacent to the Exhaust Gas Recirculation (EGR) passage. Over repeated thermal cycles, extreme exhaust gas temperatures degrade the unshielded composite plastic directly surrounding the internal EGR chimney. As the material weakens and decomposes, engine coolant running through adjacent bypass ports leaks directly into the intake tract and cylinder runners. Left unaddressed, this progressive erosion causes severe vacuum loss, unmetered air intrusion, rough idling, coolant consumption, and fatal hydraulic lock in the combustion chambers of \u003cstrong\u003eH-Body\u003c\/strong\u003e and \u003cstrong\u003eG-Body\u003c\/strong\u003e sedans.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis replacement upper plenum is engineered with premium heat-stabilized polyamide composite capable of resisting thermal degradation and cyclic fatigue. The mating face features reinforced sealing lands that accommodate the included heavy-duty carrier gasket with molded fluoroelastomer port seals. Designed to exact OEM geometry, it bolts directly to the lower aluminum runner housing while maintaining structural rigidity under high engine bay heat soak, guaranteeing consistent airflow distribution and vacuum integrity under wide-open throttle.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 Upper Intake Manifold (Reinforced Composite)\u003c\/li\u003e\n  \u003cli\u003e1 Upper Intake Manifold Gasket with Molded 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 Port 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: solid font-size: min-width:\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;\"\u003e1995-2005 Pontiac Bonneville\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 (L36 \/ L67) \/ H-Body \u0026amp; G-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;\"\u003e205–240 hp \/ 230–280 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\u003e1995-2005 Pontiac Bonneville 3.8L V6 Gas Naturally Aspirated (L36)\u003c\/li\u003e\n  \u003cli\u003e1995-1999 Pontiac Bonneville 3.8L V6 Gas Supercharged (L67)\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 \/ G-Body Bonneville?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 1995-2005 Pontiac Bonneville equipped with the \u003cstrong\u003e3800 Series II\u003c\/strong\u003e engine. \u003cstrong\u003eNote: Does not fit 2000-2005 supercharged models or 2004-2005 Bonneville GXP 4.6L Northstar V8 applications.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch4\u003eWhat is the correct installation torque sequence?\u003c\/h4\u003e\n\u003cp\u003eTorque the plenum bolts in a crisscross sequence starting from the center working outward to factory specifications of 89 in-lbs (10 Nm) on a fully cold engine.\u003c\/p\u003e\n\n\u003ch3\u003eThe Pontiac Reliability Standard\u003c\/h3\u003e\n\u003cp\u003eBuilt to withstand years of heavy throttle cycles and daily highway abuse, this manifold assembly preserves the bulletproof durability that GM performance full-size platforms are legendary for.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":68038577455352,"sku":"DS-EDCG3EG4R","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-pontiac-bonneville-1995-2005-3-8l-1.jpg?v=1794201272","url":"https:\/\/performancechiptuning.com\/products\/upper-intake-manifold-with-gasket-for-pontiac-bonneville-1995-2005-3-8l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}