{"product_id":"holden-vn-heads-308-304-air-gap-dual-plane-carby-intake-manifold","title":"Holden VN Heads 308 304 Air Gap Dual Plane Carby Intake Manifold","description":"\u003cdiv\u003e\n\u003cp\u003eUnlock maximum power from your carburetted Holden V8 with the Holden VN Heads Air Gap Dual Plane Manifold. Engineered for classic VN-era performance, this natural cast, non-EFI intake manifold delivers a steady, even air and fuel flow across the RPM range for improved throttle response, smoother idle, and reliable mid-range power.\u003c\/p\u003e \u003ch2\u003eKey features\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003eDual‑Plane configuration with Air Gap design to promote even distribution and cooling separation between intake air and engine heat\u003c\/li\u003e \u003cli\u003eCarburettor pad: square bore, compatible with modern aftermarket square-bore carburettors (manual or electric choke options)\u003c\/li\u003e \u003cli\u003eRPM operating range: 1500 to 6500\u003c\/li\u003e \u003cli\u003eNon-EGR, natural cast finish\u003c\/li\u003e \u003cli\u003ePort size: 1.19\" x 2.09\"\u003c\/li\u003e \u003cli\u003eOverall height (carb pad to bottom of manifold): 165mm (bonnet clearance should be checked)\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eIncluded and specifications\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003eIntake manifold gasket: 5REGIM-308VN\u003c\/li\u003e \u003cli\u003eCarburettor mounting studs: 5\/16-18\" (x4)\u003c\/li\u003e \u003cli\u003eMounting holes: M6 x 1.00mm (x4)\u003c\/li\u003e \u003cli\u003ePorts: 1\/4\" NPT (x1), 3\/8\" NPT (x1) with steel port plug included, 1\/2\" NPT (x3) with 2 steel port plugs included\u003c\/li\u003e \u003cli\u003eNote: Port matching to cylinder heads is recommended for optimal performance\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eFitment and compatibility\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003eFits Holden 304 V8 engines\u003c\/li\u003e \u003cli\u003eWill not suit early Holden 308 cylinder heads\u003c\/li\u003e \u003cli\u003eDesigned for late model Holden VN engine models (Non EFI)\u003c\/li\u003e \u003cli\u003eEFI version available separately (use A6010-4003 for EFI applications)\u003c\/li\u003e \u003cli\u003eIn most cases, supports late model water necks, air conditioning, alternator, and HEI ignition systems\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003ePerformance notes and installation tips\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003eAir Gap design helps keep intake air cooler and reduces heat soak for more consistent power delivery\u003c\/li\u003e \u003cli\u003eIntake runners should be port matched to your cylinder heads for best results\u003c\/li\u003e \u003cli\u003eCheck bonnet clearance before installation due to the 165mm overall height from carb pad to bottom\u003c\/li\u003e \u003cli\u003eThis manifold is tailored for carburetted setups and is compatible with square-bore carburettors with either manual or electric choke\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"My Store","offers":[{"title":"Default Title","offer_id":47273670508714,"sku":"AF6010-4000","price":637.1,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/7829\/4698\/files\/s-l1600_7226c5fa-d564-4457-a5b1-977ae4e563e1.webp?v=1753664817","url":"https:\/\/tgmperformance.com.au\/products\/holden-vn-heads-308-304-air-gap-dual-plane-carby-intake-manifold","provider":"TGM Performance Parts","version":"1.0","type":"link"}