{"product_id":"advance-headers-holden-hq-wb-5l-efi-v8-swap-extractors-a414","title":"Advance Headers | Mild Steel Engine Swap Extractors | Holden HQ-WB with 5.0L EFI V8 | A414","description":"\u003ch2\u003eAdvance Headers High-Performance Mild Steel Engine Swap Extractors for Holden HQ to WB Fitted with 5.0L EFI V8 Conversions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eThe Advance Headers Conversion Exhaust Extractors (A414) are high-flow, heavy-duty tubular manifolds custom-engineered specifically for Holden HQ, HJ, HX, HZ, and WB vehicles undergoing a late-model 5.0-Litre Electronic Fuel Injection (EFI) V8 engine swap. Purpose-built to clear the structural boundaries of the classic chassis while accommodating the updated port architecture of the injected Holden V8 block (sourced from VN through VT Commodore donors), this swap header features substantial 1-¾\" primary pipes stepping into 2\" secondaries. By optimizing exhaust gas scavenging dynamics and removing backpressure restrictions, it maximizes horsepower gains, throttle response, and yields a menacing Aussie V8 roar.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"feature-block\"\u003e\n\u003cdiv class=\"feature-content pb-6\"\u003e\n\u003ch3 style=\"color: #e60000; font-weight: bold;\"\u003e\u003cspan style=\"color: rgb(0, 0, 0);\"\u003ePRODUCT CONTENTS:\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1 x Heavy-Duty Mild Steel Left-Hand 5.0L EFI Conversion Extractor Bank Assembly\u003c\/li\u003e\n\u003cli\u003e1 x Heavy-Duty Mild Steel Right-Hand 5.0L EFI Conversion Extractor Bank Assembly\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eKey Features:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEngineered specifically to facilitate the installation of VN-VT Commodore 5.0L EFI V8 engines into older generation HQ, HJ, HX, HZ, and WB engine bays cleanly\u003c\/li\u003e\n\u003cli\u003eHigh-flow design featuring oversized 1-¾\" primary runners transitioning into 2\" secondary piping pathways to guarantee optimal top-end scavenging performance on modified or tuned street machines\u003c\/li\u003e\n\u003cli\u003eTuned mandrel-bent pathways eliminate heavy casting bottlenecks to achieve completely smooth, uniform internal flow geometry\u003c\/li\u003e\n\u003cli\u003eHeavy-duty mild steel construction structurally built to handle intense engine bay thermal expansion cycles and high-vibration conversion setups safely\u003c\/li\u003e\n\u003cli\u003eThick, precision laser-cut cylinder head flanges maintain a flat, ultra-stable mating footprint to permanently guard against warping, face distortion, and high-pressure exhaust leaks\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cdiv class=\"specs\"\u003e\n\u003cul class=\"flex flex-col space-y-2 text-xs\"\u003e\n\u003cli\u003e\n\u003cspan class=\"text-gray-500 font-semibold mr-1\"\u003eBrand:\u003c\/span\u003e \u003cspan class=\"text-gray-700\"\u003eAdvance Headers\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"text-gray-500 font-semibold mr-1\"\u003ePart Number:\u003c\/span\u003e \u003cspan class=\"text-gray-700\"\u003eA414\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"text-gray-500 font-semibold mr-1\"\u003eMaterial:\u003c\/span\u003e \u003cspan class=\"text-gray-700\"\u003eMild Steel (Standard Finish)\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"text-gray-500 font-semibold mr-1\"\u003eEngine Suitability:\u003c\/span\u003e \u003cspan class=\"text-gray-700\"\u003eHolden 5.0L EFI V8 Conversion Blocks (VN, VP, VR, VS, VT Series Engine Castings)\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"text-gray-500 font-semibold mr-1\"\u003ePrimary Pipe Diameter:\u003c\/span\u003e \u003cspan class=\"text-gray-700\"\u003e1-¾\" (44mm)\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"text-gray-500 font-semibold mr-1\"\u003eSecondary Pipe Diameter:\u003c\/span\u003e \u003cspan class=\"text-gray-700\"\u003e2\" (51mm)\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"text-gray-500 font-semibold mr-1\"\u003eComponent Type:\u003c\/span\u003e \u003cspan class=\"text-gray-700\"\u003eEngine Swap Performance Exhaust Extractors \/ Headers\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"text-gray-500 font-semibold mr-1\"\u003eEstimated Fitting Time:\u003c\/span\u003e \u003cspan class=\"text-gray-700\"\u003e1.5 Hours\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"text-gray-500 font-semibold mr-1\"\u003eWelding Required:\u003c\/span\u003e \u003cspan class=\"text-gray-700\"\u003eNo (Direct Bolt-On Configuration to Cylinder Heads)\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cstrong\u003e⚠️ Crucial Linkage Modification \u0026amp; Conversion Warnings:\u003c\/strong\u003e\u003cbr\u003e1. \u003cstrong\u003eColumn-Shift Linkage Adjustments Required:\u003c\/strong\u003e This product (Part No. \u003cstrong\u003eA414\u003c\/strong\u003e) maps tight against underbody structures to ensure clearance around steering columns and chassis mounts. \u003cstrong\u003eIf your conversion vehicle utilizes a Column-Shift transmission linkage system, these linkages will strictly require custom manual workshop modifications or repositioning\u003c\/strong\u003e to prevent physical contact with the primary pipes.\u003cbr\u003e2. \u003cstrong\u003eCylinder Head Fitment Constraint:\u003c\/strong\u003e Specifically designed for the symmetry and port heights of factory injected Holden V8 heads (VN style). Will not correctly seal or line up against early carburetted Red\/Blue\/Black engine heads (HQ-WB native blocks).\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003ePlease Note: Due to the variances across engine swap engine mounts, starter motor positioning, and column gear adjustments, professional installation by an exhaust specialist or custom performance workshop is highly recommended.\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch2\u003eImportant Information\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eThe image shown may not reflect the actual product design.\u003c\/li\u003e\n\u003cli\u003eEnsure your vehicle details match the application guide below before purchasing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv style=\"font-family: Arial, sans-serif; max-width: 100%; padding: 20px; border: 1px solid #ccc; border-radius: 5px; font-size: 1rem;\" class=\"product-details-container\"\u003e\n\u003ch2\u003eVehicle Applications for A414 Performance Holden EFI Engine Swaps\u003c\/h2\u003e\n\u003cdiv style=\"width: 100%; overflow-x: auto; -webkit-overflow-scrolling: touch; margin-bottom: 10px;\"\u003e\n\u003ctable style=\"min-width: 1100px; border-collapse: collapse; font-size: 1rem; line-height: 1.5; width: 100%;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background-color: #f0f0f0; border-bottom: 3px solid #333;\"\u003e\n\u003cth style=\"padding: 10px 8px; text-align: left; border: 1px solid #ddd; white-space: nowrap;\"\u003eMake\u003c\/th\u003e\n\u003cth style=\"padding: 10px 8px; text-align: left; border: 1px solid #ddd; white-space: nowrap;\"\u003eModel\u003c\/th\u003e\n\u003cth style=\"padding: 10px 8px; text-align: left; border: 1px solid #ddd; white-space: nowrap;\"\u003eYear Range Spec\u003c\/th\u003e\n\u003cth style=\"padding: 10px 8px; text-align: left; border: 1px solid #ddd;\"\u003eBody Type\u003c\/th\u003e\n\u003cth style=\"padding: 10px 8px; text-align: left; border: 1px solid #ddd;\"\u003eChassis Series\u003c\/th\u003e\n\u003cth style=\"padding: 10px 8px; text-align: left; border: 1px solid #ddd;\"\u003eEngine Conversion Details\u003c\/th\u003e\n\u003cth style=\"padding: 10px 8px; text-align: left; border: 1px solid #ddd; white-space: nowrap;\"\u003eFitting Time\u003c\/th\u003e\n\u003cth style=\"padding: 10px 8px; text-align: left; border: 1px solid #ddd;\"\u003eDrivetrain \/ Fitment Notes\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd; white-space: nowrap; font-weight: bold;\"\u003eHolden\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd; white-space: nowrap; font-weight: bold;\"\u003eKingswood \/ Premier \/ Belmont \/ Monaro \/ Statesman \/ Ute\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd; white-space: nowrap;\"\u003e1971 – 1985 (Chassis Range)\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e4-Door Sedan \/ 2-Door Coupe \/ 5-Door Wagon \/ Utility \/ Panel Van \/ One-Tonner\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eHQ \/ HJ \/ HX \/ HZ \/ WB Series\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e5.0L EFI V8 Conversion (VN to VT Commodore Engine Donor Swaps)\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd; white-space: nowrap;\"\u003e1.5 Hours\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eRWD | Mandrel-bent upgrade conversion routing mapped past chassis rails and crossmembers. Fits floor-shift layouts cleanly. Shifter column linkages on automatic setups must be custom modified for runner clearance.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch2\u003ePayment \u0026amp; Security\u003c\/h2\u003e\n\u003cp\u003eYour payment information is processed securely. We do not store credit card details nor have access to your credit card information.\u003c\/p\u003e","brand":"Advance Headers","offers":[{"title":"Default Title","offer_id":40480435699794,"sku":"A414","price":846.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0271\/7718\/9458\/files\/A414---Lrg-63-520x375.jpg?v=1724257162","url":"https:\/\/fastautoparts.com.au\/products\/advance-headers-holden-hq-wb-5l-efi-v8-swap-extractors-a414","provider":"Fast Auto Parts Australia","version":"1.0","type":"link"}