{"product_id":"ls1-cathedral-port-carburettor-street-single-plane-intake-manifold-black","title":"LS1 Cathedral Port Carburettor Street Single Plane Intake Manifold Black","description":"\u003cdiv\u003e\n\u003cp\u003eConvert your GM LS engine from EFI to a classic carburettor setup with this Aeroflow Performance Street low rise cast intake manifold. Built for LS Gen III and IV cathedral-port cylinder heads, this single-plane manifold channels air and fuel with precision to maximize street and enthusiast-level performance. Finished in stealthy Black, it accepts aftermarket 4150 square-bore carburettors with either manual or electric choke options.\u003c\/p\u003e \u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eSingle Plane configuration for strong high-RPM power delivery\u003c\/li\u003e \u003cli\u003e4-barrel 4150 square-bore carburettor pad (4150 flange)\u003c\/li\u003e \u003cli\u003eBlack finish for a clean, aftermarket-ready appearance\u003c\/li\u003e \u003cli\u003eDesigned for GM LS1\/LS2 cathedral-port engines (Non-EFI applications)\u003c\/li\u003e \u003cli\u003eCarburettor mounting pad accepts aftermarket 4150 square-bore carburettors\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eTechnical specifications\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eRPM operating range: 2500–7000\u003c\/li\u003e \u003cli\u003eOverall height: 122 mm from carb pad to bottom of manifold (check bonnet clearance)\u003c\/li\u003e \u003cli\u003ePort size: 0.95\" x 2.45\"\u003c\/li\u003e \u003cli\u003eCarburettor pad: Square bore, 4150 flange\u003c\/li\u003e \u003cli\u003e5\/16-18\" carburettor studs (x4)\u003c\/li\u003e \u003cli\u003e3\/8\" NPT port (x1)\u003c\/li\u003e \u003cli\u003e6 x 5\/16-18\" mounting holes\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhat’s included\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e8 x Intake Manifold O-Ring Gaskets (AF6233-5002)\u003c\/li\u003e \u003cli\u003e4 x M6 x 1.00 mm hex screws (80 mm UHL)\u003c\/li\u003e \u003cli\u003e6 x M6 x 1.00 mm hex screws (50 mm UHL)\u003c\/li\u003e \u003cli\u003e10 x M6 flat washers\u003c\/li\u003e \u003cli\u003e1 x 3\/8\" NPT steel port plug\u003c\/li\u003e \u003cli\u003eCarburettor gasket O-Ring (AF6233-5002) included with manifold\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eCompatibility and installation notes\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eIntended for retro-fitting GM LS engines from EFI to Non-EFI carburettor setups\u003c\/li\u003e \u003cli\u003eSpecifically designed for GM LS Gen III and IV engines with OE or aftermarket LS1\/LS2 cathedral-port cylinder heads\u003c\/li\u003e \u003cli\u003eSupports manual or electric choke 4150 square-bore carburettors\u003c\/li\u003e \u003cli\u003eBonnet clearance should be checked due to the manifold’s height (122 mm overall)\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhy choose this manifold\u003c\/h3\u003e\n\u003cp\u003eFor enthusiasts seeking a reliable, street-friendly path to carburettor-fed LS power, this street low-rise manifold delivers consistent air and fuel distribution across all runners, enabling smooth throttle response and solid top-end performance. The included hardware and O-Ring gaskets simplify installation, while the rugged black finish provides a clean, race-ready look that pairs well with a wide range of LS builds.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"My Store","offers":[{"title":"Default Title","offer_id":47273348333738,"sku":"AF6240-5000","price":642.2,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/7829\/4698\/files\/s-l1600_1_c4117cff-ace0-4329-9549-1408825eca66.webp?v=1753663184","url":"https:\/\/tgmperformance.com.au\/products\/ls1-cathedral-port-carburettor-street-single-plane-intake-manifold-black","provider":"TGM Performance Parts","version":"1.0","type":"link"}