{"product_id":"ls1-cathedral-port-carburettor-street-single-plane-efi-int-manifold-black","title":"LS1 Cathedral Port Carburettor Street Single Plane EFI Int Manifold Black","description":"\u003cdiv\u003e\n\u003cp\u003eGM LS Cathedral Port Carburettor Street Single Plane EFI Intake Manifold, Black Finish. Engineered for GM LS1\/LS2 cathedral-port engines with EFI, this low-rise, single-plane intake optimizes air and fuel delivery across the RPM range for street and performance applications.\u003c\/p\u003e \u003cul\u003e \u003cli\u003eFits GM LS1\/LS2 Cathedral Port Engines with EFI (non-EFI uses require AF6040-5000).\u003c\/li\u003e \u003cli\u003eSingle Plane configuration with a low-rise design for enhanced throttle response and peak power in the 2500–7000 RPM range.\u003c\/li\u003e \u003cli\u003eCarburettor pad: square bore 4150 flange for aftermarket 4150-style throttle bodies or adapter plates.\u003c\/li\u003e \u003cli\u003ePort size: 0.95\" x 2.45\".\u003c\/li\u003e \u003cli\u003eOverall height from carb pad to bottom of manifold: 122mm (check bonnet clearance).\u003c\/li\u003e \u003cli\u003eGasket O-Ring: AF6233-5002 included.\u003c\/li\u003e \u003cli\u003eCarburettor studs: 5\/16-18\" x4.\u003c\/li\u003e \u003cli\u003ePort (NPT): 3\/8\" NPT port x1.\u003c\/li\u003e \u003cli\u003eMounting holes: 6 x 5\/16-18\".\u003c\/li\u003e \u003cli\u003eRPM operating range: 2500–7000.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eIncludes and kit details\u003c\/p\u003e \u003cul\u003e \u003cli\u003eIntake Manifold includes: 8 x Intake Manifold O-Ring Gaskets (AF6233-5002), 4 x M6 x 1.00mm screws (80mm overall height), 6 x M6 x 1.00mm screws (50mm height), 10 x M6 washers, 1 x 3\/8\" NPT steel port plug.\u003c\/li\u003e \u003cli\u003eFuel Rail Kit includes: 2 x -8ORB fuel rails, -8AN crossover braided line with two 90-degree fittings, 3 x -8AN to -8ORB fittings, 1 x -8ORB hex port plug, 6 x long mounting brackets, 6 x short mounting brackets, 6 x 5\/16-18\" hex screws (18.5mm UH L), 6 x 5\/16-18\" hex screws (12mm UH L), 4 x M6 nuts.\u003c\/li\u003e \u003cli\u003eNote: This intake does not work with factory OEM fuel rails and requires Aeroflow Fuel Rail Kit AF6999-5000 (included with this package).\u003c\/li\u003e \u003cli\u003eInjector compatibility: Requires 14mm short injectors (33.60mm) or 3\/4\" length injectors (48.65mm) (sold separately).\u003c\/li\u003e \u003cli\u003ePurpose-built for retro-fit: Convert your GM LS engine to a 4150-style throttle body atop the engine for EFI-friendly high-flow performance.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWhy this manifold stands out\u003c\/p\u003e \u003cul\u003e \u003cli\u003eDedicated EFI compatibility with LS Gen III\/IV cathedral-port cylinder heads, delivering consistent air-fuel distribution for improved throttle response and mid-to-high RPM efficiency.\u003c\/li\u003e \u003cli\u003eBlack finish offers a durable, street-ready appearance with performance compatibility across a range of GM LS builds.\u003c\/li\u003e \u003cli\u003eComprehensive fuel rail and hardware kit included, simplifying installation and ensuring you have the essential components for EFI conversion in one package.\u003c\/li\u003e \u003cli\u003eClearance and fitment considerations included: bonnet clearance check due to 122mm overall height ensures proper fitment on many vehicle combinations.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"My Store","offers":[{"title":"Default Title","offer_id":47273430581418,"sku":"AF6250-5000","price":786.1,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/7829\/4698\/files\/s-l1600_1_43116ba7-2f94-47be-a423-ca1e9cddec7f.webp?v=1753663549","url":"https:\/\/tgmperformance.com.au\/products\/ls1-cathedral-port-carburettor-street-single-plane-efi-int-manifold-black","provider":"TGM Performance Parts","version":"1.0","type":"link"}