{"product_id":"amvirtuo-chevy-big-block-headers-bbc-396-454","title":"Shorty Headers for 1965-1975 Chevy Big Block 396 402 427 454 502 V8","description":"\u003cstyle\u003e\n  body { font-family: 'Helvetica Neue', Arial, sans-serif; line-height: 1.6; color: #333; max-width: 1200px; margin: 0 auto; padding: 20px; }\n  h1 { font-size: 24px; color: #101010; margin: 0 0 15px 0; }\n  h2 { font-size: 18px; color: #101010; margin: 20px 0 15px 0; border-bottom: 2px solid #162be0; padding-bottom: 8px; }\n  h3 { font-size: 14px; color: #101010; margin: 15px 0 8px 0; }\n  h4 { font-size: 13px; color: #1d1d1d; margin: 12px 0 6px 0; }\n  p { margin: 0 0 12px 0; font-size: 13px; }\n  ul { margin: 10px 0; padding-left: 25px; }\n  li { margin: 6px 0; font-size: 13px; }\n  .key-features { background-color: #f6f7f9; padding: 15px; border-radius: 8px; margin: 15px 0; }\n  .faq-item { background-color: #f6f7f9; padding: 12px 15px; border-radius: 6px; margin: 10px 0; }\n  .faq-item p { margin: 5px 0; }\n  .meta-info { background-color: #efefef; padding: 10px 15px; border-radius: 5px; margin: 8px 0; font-size: 12px; }\n  .highlight { background-color: #fff6d9; padding: 12px 15px; border-radius: 6px; margin: 15px 0; border-left: 4px solid #f5a623; }\n  .source { font-size: 11px; color: #666; font-style: italic; margin-top: 8px; }\n  table { width: 100%; border-collapse: collapse; margin: 15px 0; }\n  th { background-color: #162be0; color: #fff; padding: 12px 15px; text-align: left; font-weight: bold; }\n  td { padding: 10px 15px; border-bottom: 1px solid #e5e5e5; }\n  tr:nth-child(even) { background-color: #f9f9f9; }\n  .warning { background-color: #fff7e0; padding: 12px 15px; border-radius: 6px; margin: 15px 0; border-left: 4px solid #f5a623; }\n  .warning-title { color: #902e0c; font-weight: bold; margin-bottom: 8px; }\n\u003c\/style\u003e\n\u003c!-- H2: Key Features --\u003e\n\u003ch2\u003e\u003cb\u003eKey Features\u003c\/b\u003e\u003c\/h2\u003e\n\u003cdiv class=\"key-features\"\u003e\n\u003ch3\u003e\u003cb\u003ePremium T304 Stainless Steel Construction\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eBuilt to last with corrosion-resistant material that stands up to extreme temperatures and harsh conditions for your big block Chevy exhaust system. These BBC headers are crafted from high-grade T304 stainless steel with a polished finish that resists rust and wear.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eOptimized Primary Tube Size\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003e1-3\/4\" primary tubes deliver excellent flow characteristics for Chevy big block headers, providing improved throttle response and mid-range torque across the RPM band. The 454 headers design is optimized for street and strip applications.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003e3\" Collectors with 3\/8\" Thick Flanges\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eHeavy-duty 3\" collectors ensure maximum exhaust flow while thick 3\/8\" flanges prevent warping and ensure a leak-free seal on your 396 Chevy headers and 427 Chevy headers configurations.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eDirect Bolt-On Installation\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eDesigned as a direct replacement for factory exhaust manifolds on 1965-1975 Chevy big block applications. These 454 exhaust headers are engineered for standard deck height configurations with minimal modification needed.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eComplete Installation Kit Included\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eEach set includes header bolts and gaskets for immediate installation. These Chevy rat motor headers come ready to bolt on your BBC engine, including 396, 402, 427, 454, and 502 configurations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- H2: Description --\u003e\n\u003ch2\u003e\u003cb\u003eDescription\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003eUpgrade your classic Chevrolet's performance with our premium BBC headers designed specifically for Chevy Big Block V8 engines. Whether you're building a restored muscle car or a weekend warrior, these Chevy big block headers deliver the performance gains you're looking for without the installation headaches of full-length headers.\u003c\/p\u003e\n\u003cp\u003eCrafted from high-grade T304 stainless steel, these 454 headers and 427 Chevy headers offer superior durability and corrosion resistance compared to mild steel alternatives. The 1-3\/4\" primary tubes are precisely sized to optimize exhaust velocity, making them ideal for the street where broad torque output is essential.\u003c\/p\u003e\n\u003cp\u003eThe shorty design provides several advantages over long-tube alternatives. These Chevy 454 headers offer easier installation with better clearance for steering components, starter motors, and chassis components. They're also more compatible with factory or aftermarket exhaust systems, making them an excellent choice for restorations.\u003c\/p\u003e\n\u003cp\u003eFrom the legendary 396 Chevy headers applications found in early Chevelle SS and Camaro models, to the torque-monster 502 Chevy headers setups in later trucks and muscle cars, these headers cover the entire Big Block Chevrolet family. The standard deck height design fits most factory and aftermarket cylinder head configurations.\u003c\/p\u003e\n\u003c!-- H2: Vehicle Fitment --\u003e\n\u003ch2\u003e\u003cb\u003eVehicle Fitment\u003c\/b\u003e\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eVehicle\u003c\/th\u003e\n\u003cth\u003eYears\u003c\/th\u003e\n\u003cth\u003eEngine\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eChevrolet Chevelle\u003c\/td\u003e\n\u003ctd\u003e1965-1973\u003c\/td\u003e\n\u003ctd\u003e6.5L 396, 6.6L 402, 7.4L 454 V8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChevrolet El Camino\u003c\/td\u003e\n\u003ctd\u003e1969-1974\u003c\/td\u003e\n\u003ctd\u003e6.5L 396, 7.4L 454 V8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChevrolet Camaro\u003c\/td\u003e\n\u003ctd\u003e1970-1972\u003c\/td\u003e\n\u003ctd\u003e6.5L 396, 6.6L 402 V8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChevrolet Impala\u003c\/td\u003e\n\u003ctd\u003e1971-1974\u003c\/td\u003e\n\u003ctd\u003e6.6L 402, 7.4L 454 V8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChevrolet Caprice\u003c\/td\u003e\n\u003ctd\u003e1971-1974\u003c\/td\u003e\n\u003ctd\u003e6.6L 402, 7.4L 454 V8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChevrolet Bel Air\u003c\/td\u003e\n\u003ctd\u003e1968-1975\u003c\/td\u003e\n\u003ctd\u003e6.5L 396, 6.6L 402, 7.4L 454 V8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cdiv class=\"warning\"\u003e\n\u003cp class=\"warning-title\"\u003e⚠️ Important Fitment Notes\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eEngine Compatibility:\u003c\/b\u003e Designed for Chevrolet Big Block Mark IV engines – 396, 402, 427, 454, and 502 V8.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eDeck Height:\u003c\/b\u003e Standard deck height (9.8\") only. Not compatible with tall-deck blocks.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eRaised Port Heads:\u003c\/b\u003e These headers are designed for standard exhaust port locations. Raised exhaust port heads may require specific headers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- H2: Technical Specifications --\u003e\n\u003ch2\u003e\u003cb\u003eTechnical Specifications\u003c\/b\u003e\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Tube Diameter\u003c\/td\u003e\n\u003ctd\u003e1-3\/4\" (1.75\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCollector Diameter\u003c\/td\u003e\n\u003ctd\u003e3\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlange Thickness\u003c\/td\u003e\n\u003ctd\u003e3\/8\" (0.375\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eT304 Stainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeader Style\u003c\/td\u003e\n\u003ctd\u003eShorty \/ Block-Hugger\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEngine Family\u003c\/td\u003e\n\u003ctd\u003eChevrolet Big Block Mark IV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Engines\u003c\/td\u003e\n\u003ctd\u003e396, 402, 427, 454, 502 V8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDeck Height\u003c\/td\u003e\n\u003ctd\u003eStandard (9.8\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGasket Included\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c!-- H2: Headers vs Stock Manifolds --\u003e\n\u003ch2\u003e\u003cb\u003eHeaders vs Stock Exhaust Manifolds\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003eIf you're debating between upgrading to headers or replacing with factory-style manifolds, here's what you need to know:\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eStock Manifolds\u003c\/th\u003e\n\u003cth\u003eAMVirtuo Headers\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eCast Iron\u003c\/td\u003e\n\u003ctd\u003eT304 Stainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExhaust Flow\u003c\/td\u003e\n\u003ctd\u003eRestrictive casting\u003c\/td\u003e\n\u003ctd\u003eSmooth mandrel-bent tubing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstallation\u003c\/td\u003e\n\u003ctd\u003eDirect fit only\u003c\/td\u003e\n\u003ctd\u003eEasier than long-tube headers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePerformance\u003c\/td\u003e\n\u003ctd\u003eFactory-limited\u003c\/td\u003e\n\u003ctd\u003eImproved HP \u0026amp; torque\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSound\u003c\/td\u003e\n\u003ctd\u003eMuffled, restrictive\u003c\/td\u003e\n\u003ctd\u003eDeeper, more aggressive tone\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cb\u003eThe Bottom Line:\u003c\/b\u003e Factory cast-iron manifolds on BBC engines are known to crack and leak over time. Upgrading to stainless steel shorty headers provides improved exhaust flow, better sound, and long-lasting durability while maintaining compatibility with your existing exhaust system.\u003c\/p\u003e\n\u003c!-- H2: Installation Notes --\u003e\n\u003ch2\u003e\u003cb\u003eInstallation Notes\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003eProfessional installation is recommended for optimal results. Here are important considerations for your \u003cb\u003eBBC headers\u003c\/b\u003e installation:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eSpark Plug Access:\u003c\/b\u003e Shorty headers provide better spark plug access than long-tube headers. Consider using short-style spark plugs for improved clearance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCheck Clearance:\u003c\/b\u003e Verify clearance around steering components and starter motor.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eExhaust Connection:\u003c\/b\u003e The 3\" collector may require reducer pipes to connect to smaller factory exhaust systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePost-Installation Check:\u003c\/b\u003e After installation, start the engine and listen for exhaust leaks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"highlight\"\u003e\n\u003cp\u003e\u003cb\u003ePro Tip:\u003c\/b\u003e Shorty headers offer an excellent balance of performance gains and installation simplicity for street-driven vehicles. They provide significant improvements over stock manifolds without the clearance issues of long-tube headers. Source: Chevrolet big block enthusiast community.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- H3: What's Included --\u003e\n\u003ch3\u003e\u003cb\u003eWhat's Included\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1x Driver Side Header\u003c\/li\u003e\n\u003cli\u003e1x Passenger Side Header\u003c\/li\u003e\n\u003cli\u003eHeader Gaskets\u003c\/li\u003e\n\u003cli\u003eHeader Bolts\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- H2: Frequently Asked Questions --\u003e\n\u003ch2\u003e\u003cb\u003eFrequently Asked Questions\u003c\/b\u003e\u003c\/h2\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003e1. Will these shorty headers fit my raised exhaust port cylinder heads?\u003c\/h4\u003e\n\u003cp\u003eThese headers are designed for standard exhaust port locations commonly found on factory and most aftermarket BBC heads. If your engine has raised exhaust ports (approximately 0.300\" higher than standard), you may encounter fitment issues. In such cases, custom headers or those specifically designed for raised-port heads would be required.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003e2. What's the difference between shorty headers and long-tube headers for my BBC?\u003c\/h4\u003e\n\u003cp\u003eShorty headers (also called block-huggers) are more compact, easier to install, and provide better clearance for chassis components. They offer improved flow over stock manifolds and are ideal for street-driven vehicles. Long-tube headers typically provide greater horsepower gains at higher RPM but are more difficult to install and may have clearance issues.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003e3. Do I need to modify my exhaust system to install these headers?\u003c\/h4\u003e\n\u003cp\u003eIn most applications, these shorty headers are designed as direct bolt-on replacements for factory exhaust manifolds. However, you may need to modify or replace the exhaust pipes that connect to the collectors since the collector location may differ from your stock manifolds. The 3\" collector diameter may require reducer pipes to connect to smaller factory exhaust systems.\u003c\/p\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003e4. Are spark plugs difficult to access with these headers installed?\u003c\/h4\u003e\n\u003cp\u003eShorty headers typically provide better spark plug access than long-tube headers. Using short-style spark plugs can improve access in tight spaces. Thin-wall spark plug sockets and universal joint socket adapters are helpful tools for reaching plugs.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003e5. Will these headers work on my square-body truck with a 454?\u003c\/h4\u003e\n\u003cp\u003eThese headers are designed for 1965-1975 Big Block Chevy applications. The square body trucks (1973-1987) may have different frame and chassis clearance requirements. While the headers will bolt up to the engine, you should verify frame and steering clearance for your specific truck application.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"AMVirtuo","offers":[{"title":"Default Title","offer_id":48137885712484,"sku":"AM-33002","price":239.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0771\/1889\/8276\/files\/6391ace427ade714b70fb966024ae804_0f320c56-d9c0-4e6d-8d99-1bc60e4ba49c.jpg?v=1775460839","url":"https:\/\/avomotor.com\/products\/amvirtuo-chevy-big-block-headers-bbc-396-454","provider":"AMVirtuo MOTOR","version":"1.0","type":"link"}