{"product_id":"advance-headers-holden-v8-commodore-vt-series-2-vz-a317ss","title":"Advance Headers | Stainless Steel Exhaust Extractors | Holden Commodore VTII-VZ Statesman WH-WL LS1 LS2 | A317SS","description":"\u003ch2\u003eAdvance Headers High-Performance Premium Stainless Steel Exhaust Extractors for Holden Gen III LS1 5.7L \u0026amp; Gen IV LS2 6.0L V8 Engines\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eThe Advance Headers Stainless Steel Performance Exhaust Extractors (A317SS) represent the premium, ultra-durable iteration of the high-flow header assembly for the modern generation of Holden V8 passenger cars, muscle variants, and utility flagships. Specially manufactured from high-grade stainless steel to deliver superior structural longevity, outstanding corrosion resistance, and a striking high-end finish under the hood, this kit covers an extensive model run from the landmark VT Series II up to the final VZ lines—as well as luxury long-wheelbase Statesman\/Caprice WH to WL platforms and all-wheel-drive\/rear-wheel-drive Crewman models. Engineered strictly for General Motors 5.7-Litre Gen III LS1 and 6.0-Litre Gen IV LS2 V8 powerplants, this system replaces highly restrictive factory log manifolds to maximize exhaust gas scavenging velocity and lower under-hood heat cycles.\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 Premium Stainless 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\u003eHigh-grade stainless steel construction provides maximum defense against under-car atmospheric moisture rust, extreme gas scaling, and harsh environmental oxidation\u003c\/li\u003e\n\u003cli\u003eTuned mandrel-bent primary piping paths map perfectly to GM LS-Series oval exhaust ports, ensuring uniform velocity profiles and maximum cylinder evacuation efficiency\u003c\/li\u003e\n\u003cli\u003eSubstantially optimizes mid-to-high range horsepower and delivers notable low-end torque gains—ideal for highway cruising, rapid acceleration, towing, and street\/strip performance\u003c\/li\u003e\n\u003cli\u003eThick, precision laser-cut cylinder head flanges maintain an ultra-stable mating boundary to permanently guard against warping, face distortion, and high-pressure gas leaks\u003c\/li\u003e\n\u003cli\u003eEngineered as a direct bolt-on solution designed to route cleanly past modern K-frames, rack-and-pinion steering setups, and transmission crossmembers cleanly\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\"\u003eA317SS\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\"\u003eHigh-Grade Stainless Steel\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\"\u003eGeneral Motors 5.7L Gen III LS1 \u0026amp; 6.0L Gen IV LS2 V8 Petrol Only (Does not fit early Holden 304\/5.0L iron blocks)\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\"\u003ePremium 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\"\u003e2 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\"\u003eDependent on generation (See compliance warnings below)\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cstrong\u003e⚠️ Crucial Generation-Specific Compliance \u0026amp; Fitting Warnings:\u003c\/strong\u003e\u003cbr\u003e1. \u003cstrong\u003eVY Series II Onward Cat Converter Mandate:\u003c\/strong\u003e For all models from \u003cstrong\u003eVY Series II onward (built from October 2003 – August 2004 and including the subsequent VZ series)\u003c\/strong\u003e, the factory exhaust layout requires these headers to be fitted alongside \u003cstrong\u003enew aftermarket high-flow catalytic converters\u003c\/strong\u003e to remain physically compatible and emissions-compliant. They will not bolt directly to original factory pre-VYII catalytic pipes.\u003cbr\u003e2. \u003cstrong\u003e6.0L Oxygen Sensor Wire Extension:\u003c\/strong\u003e When retrofitting this kit onto 6.0-Litre LS2 engine variations, the relocation of the exhaust gas collectors dictates that \u003cstrong\u003eO2 sensor wiring extensions (Part No. OSER)\u003c\/strong\u003e are mandatory to safely bridge the factory harness back down to the new oxygen sensor placement loops.\u003cbr\u003e3. \u003cstrong\u003eEngine Restriction Note:\u003c\/strong\u003e Mapped exclusively for aluminum GM Gen III\/IV block footprints. It will not align with early VT Series I iron-block Holden 5.0L motors.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003ePlease Note: Professional installation by an exhaust specialist or qualified automotive mechanic is highly recommended to guarantee proper emissions linkups, sensor routing, 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 A317SS Performance Holden LS 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\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd; white-space: nowrap; font-weight: bold;\"\u003eCommodore \/ Berlina \/ Calais \/ SS \/ HSV\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd; white-space: nowrap;\"\u003e1999 – 2006\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e4-Door Sedan \/ 5-Door Station Wagon \/ Utility (Ute)\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eVT Series II \/ VX \/ VY \/ VZ Series\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e5.7L LS1 \u0026amp; 6.0L LS2 Gen III\/IV V8 Petrol Only\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd; white-space: nowrap;\"\u003e2.0 Hours\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eRWD | Premium stainless steel bolt-on upgrade path. **Note:** VY Series II onwards requires new catalytic converters. 6.0L variants require OSER harness extensions. Routes cleanly past factory steering racks. Maximum corrosion protection.\u003c\/td\u003e\n\u003c\/tr\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;\"\u003eStatesman \/ Caprice \/ HSV Grange\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd; white-space: nowrap;\"\u003e1999 – 2006\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eLong-Wheelbase (LWB) Luxury Sedan\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eWH \/ WK \/ WL Series Only\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e5.7L LS1 \u0026amp; 6.0L LS2 Gen III\/IV V8 Petrol Only\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd; white-space: nowrap;\"\u003e2.0 Hours\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eRWD | Highly durable premium layout engineered to withstand severe underbody thermal conditions while maintaining perfect cleanings around power steering systems and structural chassis steps. Complies with emissions guidelines when paired with matched converters.\u003c\/td\u003e\n\u003c\/tr\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;\"\u003eCrewman \/ One Tonner\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd; white-space: nowrap;\"\u003e2003 – 2006\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e4-Door Dual Cab Utility \/ Cab Chassis Heavy Duty\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eVY \/ VZ Commercial Lines\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e5.7L LS1 \u0026amp; 6.0L LS2 Gen III\/IV V8 Petrol Only\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd; white-space: nowrap;\"\u003e2.0 Hours\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eRWD \u0026amp; AWD | Clearanced explicitly to bridge safely around heavy commercial floor plans, transmission linkages, and front-drive subframes on Cross 8 variants. Premium stainless steel build handles extreme mechanical stress.\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":45735854112930,"sku":"A317SS","price":1380.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0576\/1112\/4898\/files\/A317---Lrg-58-520x375_2d12ada7-675e-434e-ac9c-4419de022e36.jpg?v=1754416197","url":"https:\/\/nationaltowbars.com.au\/products\/advance-headers-holden-v8-commodore-vt-series-2-vz-a317ss","provider":"National Towbars Australia","version":"1.0","type":"link"}