{"product_id":"performance-headers-for-1977-1979-ford-f-250-4wd-351m-400m-v8","title":"Performance Headers for 1977–1979 Ford F-250 4WD – 351M \/ 400M V8","description":"\u003cp\u003eUpgrade your 1977-1979 Ford F-250 (4WD) with Flashark Exhaust Headers designed for 351M and 400M engines (5.8L\/6.6L). These headers improve exhaust flow, reduce back pressure, and boost horsepower for optimal engine performance.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eFitment:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1977-1979 Ford F-250 – 351M\/400M 5.8L\/6.6L 4WD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNote: \u003c\/strong\u003eAlso fits other 1977–1979 Ford 4WD models like F-100, F-150, F-350, and Bronco. \u003ca href=\"https:\/\/flasharkracing.com\/products\/exhaust-header-for-1978-1979-ford-bronco-f100-f150-f250-f350\"\u003eSee full compatibility here\u003c\/a\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eDetails:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eStandard Uncoated Headers: 1-5\/8 in.\u003cbr\u003eTube Dia: FULL-LENGTH Design\u003cbr\u003ePrimary Tube Diameter (in):1.625\u003cbr\u003eTubes Tube Diameter:1-5\/8 in\u003cbr\u003eReducer Outlet Size: 2-1\/2 In.\u003cbr\u003eCollector Diameter: 3 In.\u003cbr\u003eCollector Size: 3 In.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eBrand Name: FLASHARK\u003cbr\u003eCertificate: ISO9001:2000\u003cbr\u003eApplication: Automobile Exhaust Header\u003cbr\u003eSurface: Mirror Polish\u003cbr\u003eModel: EH28225\u003cbr\u003eMaterial: Stainless Steel\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eOur black Exhaust Header features a high-quality black coating over durable stainless steel, specifically designed for 351M and 400M engines. This extra layer enhances the appearance while protecting the header from harsh driving conditions, ensuring long-lasting performance and reliability.\u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eTuned-length primary tubes for maximum exhaust scavenging and velocity\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eMandrel-bent tubing for smooth exhaust flow\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eLong transition collector for decreased back pressure\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e5\/16 machined flanges for a perfect seal\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eIndustry™s best welds for durability\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eDesigned for optimal performance\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eAll necessary hardware included for a complete installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0293\/4423\/5619\/files\/Exhaust_Header_for_1977-1979_Ford_Bronco_F100_F150_F250_F350_4WD_351-400M_5.8L_6.6L_PU_2.jpg?v=1723780142\" alt=\"Exhaust Header for 1977-1979 Ford Bronco F100 F150 F250 F350 4WD 351M\/400M 5.8L 6.6L\" style=\"margin-bottom: 16px; float: none;\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cimg alt=\"1977-1979 Ford 351M\/400M Exhaust Header Parameter Details\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0293\/4423\/5619\/files\/Exhaust_Header_for_1977-1979_Ford_Bronco_F100_F150_F250_F350_4WD_351-400M_5.8L_6.6L_PU_3.jpg?v=1723780184\" style=\"margin-bottom: 16px; float: none;\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cimg style=\"float: none;\" alt=\"1977-1979 Ford 351M\/400M Exhaust Header Advantages\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0293\/4423\/5619\/files\/Exhaust_Header_for_1977-1979_Ford_Bronco_F100_F150_F250_F350_4WD_351-400M_5.8L_6.6L_PU_4.jpg?v=1723780206\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cimg style=\"float: none;\" alt=\"1977-1979 Ford 351M\/400M Exhaust Header Applicable Models\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0293\/4423\/5619\/files\/Exhaust_Header_for_1977-1979_Ford_Bronco_F100_F150_F250_F350_4WD_351-400M_5.8L_6.6L_PU_1.jpg?v=1723780228\"\u003e\u003c\/div\u003e\n\u003ch3\u003eExhaust Headers vs. Manifold: Why Headers Are the Best Upgrade for Your 351M Engine\u003c\/h3\u003e\n\u003cp\u003eThe key difference between \u003ca href=\"https:\/\/flasharkracing.com\/collections\/exhaust-header\" target=\"_blank\"\u003eexhaust headers\u003c\/a\u003e and manifolds is in both material and performance. Exhaust headers, made from lightweight, high-quality steel, are designed to optimize exhaust flow. Unlike thick iron manifolds, headers are longer and have individual tubes for each cylinder, which helps eliminate back pressure. This results in increased horsepower and improved efficiency, especially for 351M\/400M engines.\u003c\/p\u003e\n\u003cp\u003eUpgrading to Flashark Exhaust Headers will enhance engine performance and exhaust sound for your Ford Bronco or F-Series with a 351M\/400M engine. Whether for daily driving or off-road adventures, these headers are engineered for maximum power with an easy, direct bolt-on installation—no modifications needed.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy Choose Our Natural Stainless Steel Headers Over Black-Coated Alternatives?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWhile some competitors offer black-coated headers for a \"stealth\" look, our untreated stainless steel headers provide superior durability and long-term performance without compromises.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo Peeling or Fading\u003c\/strong\u003e – Black coatings often chip, flake, or discolor under extreme heat, leaving a patchy, worn appearance. Our bare stainless steel maintains its integrity for years, resisting corrosion and wear.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBetter Heat Dissipation\u003c\/strong\u003e – Coatings can trap heat, reducing efficiency. Unpainted stainless steel allows optimal thermal transfer, helping your engine run cooler.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZero Maintenance\u003c\/strong\u003e – Unlike coated headers that require touch-ups, our stainless steel finish stays clean with minimal care—no worries about scratched paint or rust spots.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProven Material Quality\u003c\/strong\u003e – High-grade 304 stainless steel naturally resists oxidation, so it won’t degrade like cheap painted alternatives.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"text-align: center;\"\u003eFAQ\u003c\/h3\u003e\n\u003ch4\u003eQ: What is the primary tube diameter of these headers?\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e The primary tube diameter is 1-5\/8 inches (1.625 inches). This size ensures smooth exhaust flow and improves performance, particularly for 351M\/400M engines.\u003c\/p\u003e\n\u003ch4\u003eQ: Do these headers fit 4WD vehicles?\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes, these Flashark Exhaust Headers are designed to fit 4WD models, including the 1977-1979 Ford Bronco, F100, F150, F250, and F350 with 351M\/400M 5.8L\/6.6L engines.\u003c\/p\u003e\n\u003ch4\u003eQ: Are these headers made of stainless steel?\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003eA: \u003c\/strong\u003eYes, these Flashark Exhaust Headers are made of 304 stainless steel and are coated for added durability. The coating enhances the aesthetic appeal while protecting the headers from harsh driving conditions.\u003c\/p\u003e\n\u003ch4\u003eQ: Do these headers fit 2WD models?\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003eA: \u003c\/strong\u003eNo, these headers are specifically designed for 4WD vehicles. They may not fit 2WD models like the 1978 F250 2WD with a 400 engine, as the chassis and exhaust configurations differ between 4WD and 2WD variants.\u003c\/p\u003e","brand":"Flashark","offers":[{"title":"Default Title","offer_id":51797433778462,"sku":"FLES08376","price":270.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0679\/7171\/1262\/files\/Long-Tube-Headers-for-Ford-F-350-1977_1979-4WD-_-5.8L-6.6L-V8-_351M-400M_-Flashark-96619152.jpg?v=1777493917","url":"https:\/\/platinumhpsolutions.myshopify.com\/fr\/products\/performance-headers-for-1977-1979-ford-f-250-4wd-351m-400m-v8","provider":"Platinum High Performance Solutions, LLC.","version":"1.0","type":"link"}