{"product_id":"exhaust-manifold-header-kit-for-77-79-ford-f150-250-350-bronco-4wd-351-400-ci-v8","title":"Exhaust Manifold Header Kit for 77-79 Ford F150\/250\/350 Bronco 4WD 351-400 Ci V8","description":"\u003cdiv class=\"xkv-product-description\"\u003e\n\n  \u003cp\u003e\n    This stainless steel exhaust manifold header kit is designed for listed 1977–1979 Ford F150, F250, F350 Pickup Truck and 1978–1979 Ford Bronco 4WD applications with 351M \/ 400M V8 engines. It is intended as a long tube header replacement or upgrade-style kit for compatible Ford 4WD truck and Bronco exhaust setups.\n  \u003c\/p\u003e\n\n  \u003cp\u003e\n    Built from T304 stainless steel with 1-5\/8\" OD primaries, 3\" OD collectors, 3\" to 2-1\/2\" weldable collector reducers, TIG-welded CNC-machined flanges, long tube construction, flange connections, metal gasket included, and 2 x 4-1 racing-style design as listed, this header kit is designed to support a secure exhaust path where compatible. Final fitment, sound, exhaust sealing, clearance, drivability, and performance results may vary depending on vehicle condition, engine family, 4WD layout, exhaust configuration, installation quality, emissions setup, and supporting components.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eProduct Overview\u003c\/h3\u003e\n  \u003cp\u003e\n    This product is an exhaust manifold header kit for compatible Ford 351M \/ 400M 4WD truck and Bronco applications. It is not a universal header kit, catback exhaust system, downpipe, turbo manifold, Windsor engine header, 2WD header kit, or complete exhaust system. Please verify your exact model year, engine family, 4WD configuration, flange layout, collector connection, downstream exhaust connection, and emissions requirements before purchase.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eKey Details\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e Listed 1977–1979 Ford F150 \/ F250 \/ F350 Pickup and 1978–1979 Ford Bronco applications\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eEngine:\u003c\/strong\u003e 5.8L 351M \/ 6.6L 400M V8 engines as listed\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDrive Layout:\u003c\/strong\u003e 4WD models only as listed\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Exhaust Manifold Header Kit \/ Long Tube Header Kit\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e T304 stainless steel as listed\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePrimary Size:\u003c\/strong\u003e 1-5\/8\" OD primaries as listed\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCollector Size:\u003c\/strong\u003e 3\" OD collector as listed\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eReducer:\u003c\/strong\u003e 3\" OD to 2-1\/2\" OD weldable collector reducers as listed\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eHeader Design:\u003c\/strong\u003e 2 x 4-1 racing-style design as listed\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eConstruction:\u003c\/strong\u003e TIG-welded CNC-machined flanges as listed\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eIncluded Component:\u003c\/strong\u003e Metal gasket included as listed\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eImportant Exclusions:\u003c\/strong\u003e Excludes Windsor engines and all 2WD models as listed\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eInstallation:\u003c\/strong\u003e Professional installation highly recommended\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eInstruction:\u003c\/strong\u003e No installation instructions included unless otherwise stated on the product page\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eUse Case:\u003c\/strong\u003e Off-road, racing, or closed-course use where emissions laws apply\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eFitment\u003c\/h3\u003e\n  \u003cp\u003e\n    Please use the table below to quickly confirm the main vehicle applications listed for this header kit. Before ordering, verify your exact model year, engine family, 4WD configuration, flange layout, collector connection, downstream exhaust layout, and emissions setup.\n  \u003c\/p\u003e\n\n  \u003cdiv class=\"xkv-fitment-table-wrap\"\u003e\n    \u003ctable class=\"xkv-fitment-table\"\u003e\n      \u003cthead\u003e\n        \u003ctr\u003e\n          \u003cth\u003eVehicle Name\u003c\/th\u003e\n          \u003cth\u003eYear\u003c\/th\u003e\n          \u003cth\u003eEngine\u003c\/th\u003e\n          \u003cth\u003eNotes\u003c\/th\u003e\n        \u003c\/tr\u003e\n      \u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eFord F150 Pickup Truck\u003c\/td\u003e\n          \u003ctd\u003e1977–1979\u003c\/td\u003e\n          \u003ctd\u003e5.8L 351M \/ 6.6L 400M V8\u003c\/td\u003e\n          \u003ctd\u003e4WD models only; verify engine family, flange layout, collector connection, and exhaust setup\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eFord F250 Pickup Truck\u003c\/td\u003e\n          \u003ctd\u003e1977–1979\u003c\/td\u003e\n          \u003ctd\u003e5.8L 351M \/ 6.6L 400M V8\u003c\/td\u003e\n          \u003ctd\u003e4WD models only; verify engine family, frame clearance, and downstream exhaust connection\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eFord F350 Pickup Truck\u003c\/td\u003e\n          \u003ctd\u003e1977–1979\u003c\/td\u003e\n          \u003ctd\u003e5.8L 351M \/ 6.6L 400M V8\u003c\/td\u003e\n          \u003ctd\u003e4WD models only; verify exact truck configuration and exhaust routing\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eFord Bronco\u003c\/td\u003e\n          \u003ctd\u003e1978–1979\u003c\/td\u003e\n          \u003ctd\u003e5.8L 351M \/ 6.6L 400M V8\u003c\/td\u003e\n          \u003ctd\u003e4WD models only; verify engine family, collector connection, and exhaust setup\u003c\/td\u003e\n        \u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"xkv-fitment-note\"\u003e\n    \u003cstrong\u003eFitment Note:\u003c\/strong\u003e This table is based on the fitment information currently listed for this product. This header kit fits listed 351M \/ 400M 4WD models only. It excludes Windsor motors and all 2WD models. Please verify your exact model year, engine family, 4WD configuration, flange layout, collector connection, downstream exhaust layout, and emissions setup before purchase.\n  \u003c\/div\u003e\n\n  \u003ch3\u003ePackage Includes\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eLong tube exhaust header components as shown\u003c\/li\u003e\n    \u003cli\u003e3\" to 2-1\/2\" weldable collector reducers as listed\u003c\/li\u003e\n    \u003cli\u003eMetal gasket included as listed\u003c\/li\u003e\n    \u003cli\u003eFlange connection components as shown or listed\u003c\/li\u003e\n    \u003cli\u003eHardware, bolts, or additional accessories included only if shown or listed\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \u003cp\u003e\n    Please review the product photos and listing details before installation. Confirm all included headers, reducers, gaskets, flanges, fasteners, and connection requirements against the received package before beginning installation.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eInstallation Notes\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eProfessional installation is highly recommended.\u003c\/li\u003e\n    \u003cli\u003eNo installation instructions are included unless otherwise stated on the product page.\u003c\/li\u003e\n    \u003cli\u003eTest fit both header sides and collector reducer connections before final tightening.\u003c\/li\u003e\n    \u003cli\u003eVerify cylinder head flange alignment, gasket seating, collector connection, reducer fitment, and downstream exhaust compatibility before installation.\u003c\/li\u003e\n    \u003cli\u003eCheck clearance around the steering shaft, frame, starter, transmission, transfer case, front driveshaft, suspension components, wiring, heat shields, and surrounding exhaust components.\u003c\/li\u003e\n    \u003cli\u003eOld, rusted, or seized factory hardware may increase installation difficulty.\u003c\/li\u003e\n    \u003cli\u003eModified exhaust systems, engine swaps, previous repairs, non-factory configurations, Windsor engines, or 2WD layouts may require additional work and are not assumed compatible.\u003c\/li\u003e\n    \u003cli\u003eInspect all exhaust connections for leaks after installation and recheck fasteners after initial heat cycles where appropriate.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eBefore You Buy\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eThis product is intended for listed 1977–1979 Ford F150 \/ F250 \/ F350 Pickup and 1978–1979 Ford Bronco 4WD models with 351M \/ 400M V8 engines only.\u003c\/li\u003e\n    \u003cli\u003eThis product excludes Windsor motors and all 2WD models as listed.\u003c\/li\u003e\n    \u003cli\u003eThis is an exhaust manifold header kit \/ long tube header kit, not a universal header kit, catback exhaust system, downpipe, turbo manifold, Windsor engine header, 2WD header kit, or complete exhaust system.\u003c\/li\u003e\n    \u003cli\u003ePlease verify your exact model year, engine family, 4WD configuration, flange layout, collector connection, downstream exhaust connection, and emissions setup before purchase.\u003c\/li\u003e\n    \u003cli\u003eFitment may vary by truck configuration, factory exhaust layout, previous repairs, engine swaps, suspension setup, and installed exhaust modifications.\u003c\/li\u003e\n    \u003cli\u003eThis product may alter the factory exhaust or emissions-related configuration depending on the vehicle setup.\u003c\/li\u003e\n    \u003cli\u003eThis product is intended for off-road, racing, or closed-course use where emissions laws apply.\u003c\/li\u003e\n    \u003cli\u003eThis product is not represented as street legal, emissions-compliant, CARB-compliant, or legal for public road use unless explicitly stated.\u003c\/li\u003e\n    \u003cli\u003ePerformance gains, sound changes, exhaust flow changes, fitment, clearance, and drivability results are not guaranteed and may vary by setup.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n\u003c\/div\u003e\n\n\u003cstyle\u003e\n  .xkv-product-description {\n    font-family: Arial, sans-serif;\n    line-height: 1.5;\n    color: #333;\n  }\n\n  .xkv-product-description h3 {\n    margin-top: 28px;\n    margin-bottom: 12px;\n    color: #062E94;\n    font-size: 20px;\n    font-weight: 700;\n  }\n\n  .xkv-product-description p {\n    margin-bottom: 14px;\n  }\n\n  .xkv-product-description ul {\n    margin: 0 0 18px 20px;\n    padding: 0;\n  }\n\n  .xkv-product-description li {\n    margin-bottom: 8px;\n  }\n\n  .xkv-fitment-table-wrap {\n    width: 100%;\n    overflow-x: auto;\n    margin: 18px 0 20px;\n    border: 1px solid #d9dde5;\n    border-radius: 8px;\n    box-shadow: 0 2px 10px rgba(0,0,0,0.04);\n  }\n\n  .xkv-fitment-table {\n    width: 100%;\n    min-width: 760px;\n    border-collapse: collapse;\n    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