{"product_id":"advance-headers-commodore-vb-vs-ls-conversion-lh-starter-extractors-a317vl","title":"Advance Headers | Mild Steel Tri-Y Conversion Extractors | Holden Commodore VB-VS GM LS V8 Swap | A317VL","description":"\u003ch2\u003eAdvance Headers High-Performance Mild Steel Tri-Y Conversion Extractors for Holden Commodore VB to VS GM LS V8 Engine Swaps\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eThe Advance Headers Performance Engine Conversion Extractors (A317VL) are the definitive, high-flowing tubular header solution for classic first and second-generation Holden Commodore platforms undergoing a modern General Motors (GM) LS-Series V8 engine swap. Precision-engineered as a dedicated conversion system to overcome severe tight-squeeze boundaries, this heavy-duty Tri-Y kit fits GM Gen III and Gen IV LS V8 powerplants retrofitted into VB, VC, VH, VK, VL, VN, VP, VR, and VS body shells. By optimizing clearance configurations around specialized manual steering boxes and relocating standard components, this system maximizes exhaust gas velocity to unlock massive low-to-mid range V8 working torque.\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 Tri-Y Conversion Extractor Header Assembly\u003c\/li\u003e\n\u003cli\u003e1 x Heavy-Duty Mild Steel Right-Hand Tri-Y Conversion Extractor Header Assembly\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eKey Features:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eHigh-efficiency Tri-Y (4-2-1) configuration steps primary gas columns down into secondary pairings to significantly boost low-end scavenging torque and mid-range throttle response\u003c\/li\u003e\n\u003cli\u003eHeavy-wall mandrel-bent 1¾\" primary piping transitions cleanly into uniform 2\" secondary runners to sustain peak engine breathing without backpressure traps\u003c\/li\u003e\n\u003cli\u003eEngineered specifically to solve custom engine swap clearance boundaries, dropping cleanly past early K-frames, altered firewalls, and compact under-bonnet profiles\u003c\/li\u003e\n\u003cli\u003eHeavy-duty mild steel construction structurally built to handle extreme LS V8 thermal cycles, prolonged performance heat loads, and street\/strip vibrations 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\"\u003eA317VL\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\"\u003eDesign Layout:\u003c\/span\u003e \u003cspan class=\"text-gray-700\"\u003eMandrel Bent Tri-Y (4-2-1) Performance Profile\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\"\u003e1¾\" (44.5mm)\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\" (50.8mm)\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\"\u003eGM Gen III \/ Gen IV LS V8 Swap Engines (e.g., 5.7L LS1, 6.0L LS2\/L76\/L98, 6.2L LS3 Conversions)\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\"\u003e2.5 Hours\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"text-gray-500 font-semibold mr-1\"\u003eWelding\/Modification Required:\u003c\/span\u003e \u003cspan class=\"text-gray-700\"\u003eYes (Requires custom downstream link fabrication to complete vehicle exhaust system connection)\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cstrong\u003e⚠️ Mandatory Engine Swap Hardware Fitment Restrictions:\u003c\/strong\u003e\u003cbr\u003eThis specialized conversion product (Part No. \u003cstrong\u003eA317VL\u003c\/strong\u003e) is \u003cstrong\u003eNOT a direct drop-in replacement for standard vehicles\u003c\/strong\u003e. It features severe spatial alterations designed explicitly for custom engine swaps and will strictly only fit if the following modifications are present:\u003cbr\u003e1. \u003cstrong\u003eLeft-Hand Starter Conversion Mandate:\u003c\/strong\u003e The driver-side primary pipelines are routed through the space originally occupied by the starter motor. You \u003cstrong\u003eMUST utilize a left-hand (passenger-side) starter motor conversion bellhousing\/adaptor kit\u003c\/strong\u003e to physically clear these headers.\u003cbr\u003e2. \u003cstrong\u003eManual Steering Rack Requirement:\u003c\/strong\u003e Tube clearance profiles are shaped strictly around the tighter, narrow footprint of a \u003cstrong\u003emanual steering rack assembly\u003c\/strong\u003e. This product will not clear bulky original factory power steering boxes or hydraulic variable-assist rack frameworks due to side-rail path constraints.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003ePlease Note: Due to the tight tolerances and extensive architectural adjustments involved in custom LS engine swaps, professional installation by an exhaust specialist or a qualified conversion performance workshop is highly recommended to guarantee proper system mapping and a perfect gas-tight 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 conversion 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 Conversion Applications for A317VL Performance Tri-Y 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 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 \/ Mandatory 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 (Conversion)\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd; white-space: nowrap; font-weight: bold;\"\u003eCommodore \/ Calais \/ Berlina \/ SS\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd; white-space: nowrap;\"\u003e1978 – 1997 (LS Swap Era)\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e4-Door Sedan \/ 5-Door Station Wagon \/ Utility (VG-VS Ute)\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eVB \/ VC \/ VH \/ VK \/ VL \/ VN \/ VP \/ VR \/ VS Series\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eGeneral Motors Gen III \/ Gen IV LS V8 (5.7L LS1, 6.0L LS2, 6.2L LS3, etc.)\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd; white-space: nowrap;\"\u003e2.5 Hours\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eRWD | Tri-Y configuration with 1¾\" primaries and 2\" secondaries. Custom conversion layout routes safely past early subframes. **Strictly Requires:** Left-hand side starter motor conversion and a manual steering rack assembly. Will not clear standard power steering gear.\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":40480301809746,"sku":"A317VL","price":1179.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0271\/7718\/9458\/files\/GenericHeader.png?v=1744853371","url":"https:\/\/fastautoparts.com.au\/products\/advance-headers-commodore-vb-vs-ls-conversion-lh-starter-extractors-a317vl","provider":"Fast Auto Parts Australia","version":"1.0","type":"link"}