{"product_id":"advance-headers-commodore-vb-vk-v8-bosch-starter-extractors-a313d","title":"Advance Headers | Mild Steel Exhaust Extractors | Holden Commodore VB-VK 253 308 V8 Bosch Starter | A313D","description":"\u003ch2\u003eAdvance Headers High-Performance Mild Steel Exhaust Extractors for HOLDEN Commodore VB to VK 253 \u0026amp; 308 V8 Engines\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eThe Advance Headers Performance Exhaust Extractors (A313D) are precision-engineered for first-generation classic Holden Commodore platforms running the legendary 4.2-Litre 253ci and 5.0-Litre 308ci iron-block V8 engines. Specifically developed to solve common clearance headaches in early early-girl Commodore engine bays, this heavy-duty tubular header set is custom-profiled to clear a compact Bosch high-torque starter motor. By replacing highly restrictive factory cast iron manifolds, this system maximizes exhaust gas scavenging velocity, lowers backpressure, and unleashes that iconic deep, crisp classic Aussie V8 rumble.\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 Performance Exhaust Extractor Header Set (Left \u0026amp; Right Bank Assembly)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eKey Features:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eTuned mandrel-bent primary piping pathways ensure completely uniform internal flow geometry, optimizing gas velocity and removing heavy factory cast restrictions\u003c\/li\u003e\n\u003cli\u003eEngineered with a specific clearance track to accommodate a Bosch high-torque reduction starter motor safely without melting wiring or requiring dangerous heat shielding tricks\u003c\/li\u003e\n\u003cli\u003eSubstantially optimizes low-to-mid range torque acceleration—giving modified street cruisers, tough muscle builds, and street\/strip restorations a notable performance boost\u003c\/li\u003e\n\u003cli\u003eHeavy-duty mild steel construction structurally built to handle intense under-bonnet V8 thermal transitions and demanding operational heat cycles 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 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\"\u003eA313D\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 253ci (4.2L) \u0026amp; 308ci (5.0L) Pushrod V8 Carburettor \/ Early EFI Engines Only\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"text-gray-500 font-semibold mr-1\"\u003eStarter Motor Fitment:\u003c\/span\u003e \u003cspan class=\"text-gray-700\"\u003eFits with Bosch High Torque Gear Reduction Starter\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\"\u003ePerformance 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\"\u003e3 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 Head)\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cstrong\u003e⚠️ Crucial Starter Motor \u0026amp; Chassis Fitment Warnings:\u003c\/strong\u003e\u003cbr\u003e1. \u003cstrong\u003eStarter Motor Requirement:\u003c\/strong\u003e This product (Part No. \u003cstrong\u003eA313D\u003c\/strong\u003e) has primary tube routing altered specifically to tuck around smaller, aftermarket \u003cstrong\u003eBosch-style high-torque mini starters\u003c\/strong\u003e. It may not clear bulky, full-size original factory Delco-Remy or early Lucas starter motors due to tight layout boundaries near the engine block block paths.\u003cbr\u003e2. \u003cstrong\u003eChassis Limitations:\u003c\/strong\u003e Mapped explicitly for the early generation \u003cstrong\u003eVB, VC, VH, VK Commodore body shell parameters\u003c\/strong\u003e. It will not slide down correctly into later VL, VN, or VP engine configurations due to K-frame and steering rack routing variations.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003ePlease Note: Professional installation by an exhaust specialist or qualified classic automotive mechanic is highly recommended to guarantee proper system alignment and a perfect leak-free seal.\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 A313D Performance Holden V8 Extractors\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 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 \/ G.M.H.\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd; white-space: nowrap; font-weight: bold;\"\u003eCommodore \/ SL \/ SLE \/ Calais \/ SS\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd; white-space: nowrap;\"\u003e1978 – 1986\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e4-Door Sedan \/ 5-Door Station Wagon\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eVB \/ VC \/ VH \/ VK Series Only\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eHolden 4.2L 253 \u0026amp; 5.0L 308 V8 Petrol (Iron Head Layouts)\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd; white-space: nowrap;\"\u003e3.0 Hours\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eRWD | Precision tubular upgrade routes safely past classic mechanical or power steering boxes and early manual\/automatic gearboxes. Engineered to fit models utilizing a compact Bosch high-torque starter motor.\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":40480298893394,"sku":"A313D","price":780.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0271\/7718\/9458\/files\/A313D---Lrg-52-520x375.jpg?v=1724257008","url":"https:\/\/fastautoparts.com.au\/products\/advance-headers-commodore-vb-vk-v8-bosch-starter-extractors-a313d","provider":"Fast Auto Parts Australia","version":"1.0","type":"link"}