{"product_id":"ls1-cathedral-port-carburettor-hi-rise-single-plane-intake-manifold-black","title":"LS1 Cathedral Port Carburettor Hi Rise Single Plane Intake Manifold Black","description":"\u003cdiv\u003e\n\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eConvert your GM LS engine from EFI to a non-EFI carburettor with the LS1 Cathedral Port Hi Rise Single Plane Intake Manifold in a bold black finish. This hi-rise, Super Victor‑style cast intake delivers steady air and fuel distribution at high rpm, ideal for retro-fit carburettor setups on LS Gen III and IV cathedral port heads.\u003c\/p\u003e \u003ch2\u003eCompatibility \u0026amp; Use\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003eDesigned for GM LS Gen III and IV engines equipped with OE or aftermarket LS1\/LS2 cathedral port heads.\u003c\/li\u003e \u003cli\u003eIntended for carburetted, throttle body EFI, or port EFI applications.\u003c\/li\u003e \u003cli\u003eHi‑Rise single‑plane configuration optimized for high rpm and large displacement builds.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003e4-barrel 4150 square‑bore carburettor pad (4150 flange) for aftermarket square-bore carburettors.\u003c\/li\u003e \u003cli\u003eOverall height from carb pad to bottom: 171 mm — check bonnet clearance before installation.\u003c\/li\u003e \u003cli\u003ePort size: 1.08\" x 2.50\".\u003c\/li\u003e \u003cli\u003eIntake gasket interface: flat style gasket; must use Fel Pro 1312-2 or 1312-3.\u003c\/li\u003e \u003cli\u003eCarburettor mounting hardware: 5\/16-18\" carburettor studs (x4).\u003c\/li\u003e \u003cli\u003eIncludes installation hardware: 10 x M6 x 1.00 mm hex screws (50 mm UHL) and 10 x M6 flat washers.\u003c\/li\u003e \u003cli\u003eFinish: durable black powder-coated\/manufactured finish for a stealthy, race‑ready look.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eWhat You Get\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003eIntake manifold with hi‑rise, single‑plane design for even air\/fuel distribution at high rpm.\u003c\/li\u003e \u003cli\u003eHardware kit: M6 screws and washers for mounting (quantity specified above).\u003c\/li\u003e \u003cli\u003eCarburettor pad prepared for aftermarket 4150 square‑bore carbs with either manual or electric choke options.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003ePerformance \u0026amp; Installation Notes\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003eRPM operating range: 3500 to 8000, suited for high‑rpm racing or performance street builds.\u003c\/li\u003e \u003cli\u003eHi‑Rise design supports larger cubic inch applications where scavenging and plenums benefit from increased velocity at higher engine speeds.\u003c\/li\u003e \u003cli\u003eBonnet clearance is a critical consideration due to the 171 mm manifold height; verify space before purchase.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"My Store","offers":[{"title":"Default Title","offer_id":47266847162538,"sku":"AF6240-5005","price":652.5,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/7829\/4698\/files\/s-l1600_1_d1001527-1e20-4ae5-bdaf-47f43f15eb56.webp?v=1753412397","url":"https:\/\/tgmperformance.com.au\/products\/ls1-cathedral-port-carburettor-hi-rise-single-plane-intake-manifold-black","provider":"TGM Performance Parts","version":"1.0","type":"link"}