{"product_id":"ls-cathedral-port-carburettor-hi-rise-race-single-plane-efi-manifold-black","title":"LS Cathedral Port Carburettor Hi Rise Race Single Plane EFI Manifold Black","description":"\u003cdiv\u003e\n\u003ch2\u003eLS Cathedral Port Hi Rise Race EFI Manifold – Black\u003c\/h2\u003e\n\u003cp\u003eUnlock optimized airflow and high‑RPM performance on GM LS1\/LS2 cathedral‑port engines with this Hi Rise, single‑plane EFI intake manifold. Designed for EFI applications, it enables 4150 square‑bore throttle bodies or adapters for retro‑fits, giving you a steady, even air\/fuel distribution from ~2500 to 7000 RPM.\u003c\/p\u003e \u003cul\u003e \u003cli\u003eCathedral port compatibility: specifically fits GM LS1\/LS2 cathedral‑port cylinder heads\u003c\/li\u003e \u003cli\u003eEFI only: engineered for electronic fuel injection; non‑EFI applications require AF6040-5005\u003c\/li\u003e \u003cli\u003eHi Rise, single‑plane configuration to maximize top‑end power while preserving mid‑range efficiency\u003c\/li\u003e \u003cli\u003eCarburettor pad: 4150 square‑bore flange; uses aftermarket 4150 throttle bodies or adapter plates\u003c\/li\u003e \u003cli\u003eOverall height: 172 mm from carb pad to bottom of manifold (check bonnet clearance)\u003c\/li\u003e \u003cli\u003ePort size: 1.08\" x 2.45\"\u003c\/li\u003e \u003cli\u003eGasket compatibility: flat style gasket—Fel Pro 1312-2 or 1312-3 recommended\u003c\/li\u003e \u003cli\u003eCarburettor studs: includes 4 x 5\/16-18\" studs\u003c\/li\u003e \u003cli\u003eFuel rails mounting: 4 x M6 x 1.00mm mounting holes for rails\u003c\/li\u003e \u003cli\u003eIntake manifold includes: 10 x M6 x 1.00mm hex screws (50 mm UHL) and 10 x M6 flat washers\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eFuel rails, installation, and injectors\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eFuel rails kit required: Aeroflow Fuel Rail Kit AF6999-5000 is included with the manifold\u003c\/li\u003e \u003cli\u003eNote: This manifold does not work with factory OEM fuel rails\u003c\/li\u003e \u003cli\u003eInjector requirement: uses 14 mm short injectors (sold separately)\u003c\/li\u003e \u003cli\u003eFuel rails kit contents: two fuel rails (-8ORB), -8AN crossover braided line with two 90° fittings, -8AN to -8ORB adapters and fittings, -8ORB port plug, mounting brackets, and assorted screws\/nuts\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eThe Aeroflow Performance Hi Rise cast intake manifold is designed to convert your GM LS engine to accommodate a 4150 style throttle body on top, making it ideal for retrofit applications with OE or aftermarket LS1\/LS2 cathedral port heads. Its precisely engineered air and fuel pathway helps maintain a steady flow into the engine for reliable power delivery across the intended RPM range, giving you controlled, high‑performance EFI calibration potential.\u003c\/p\u003e \u003cul\u003e \u003cli\u003eRPM operating range: 2500–7000\u003c\/li\u003e \u003cli\u003eFinish: Black\u003c\/li\u003e \u003cli\u003eEngine family: GM LS Gen III\/IV with LS1\/LS2 cathedral port heads\u003c\/li\u003e \u003cli\u003eCompatibility: EFI applications only; not compatible with factory fuel rails\u003c\/li\u003e \u003cli\u003eRetrofit readiness: accepts aftermarket 4150 square‑bore throttle bodies or adapter plates\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"My Store","offers":[{"title":"Default Title","offer_id":47273506668714,"sku":"AF6250-5001","price":888.8,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/7829\/4698\/files\/s-l1600_1_fa131de5-9889-4f1e-badd-60ff7f184604.webp?v=1753663884","url":"https:\/\/tgmperformance.com.au\/products\/ls-cathedral-port-carburettor-hi-rise-race-single-plane-efi-manifold-black","provider":"TGM Performance Parts","version":"1.0","type":"link"}