{"product_id":"for-551316-cathedral-port-cyl-head-to-rectangle-port-intake-manifold-adapters","title":"For 551316 Cathedral Port Cyl Head to Rectangle Port Intake Manifold Adapters","description":"\u003ch2\u003eFor 551316 Cathedral Port Cyl Head to Rectangle Port Intake Manifold Adapters\u003c\/h2\u003e\u003cp\u003eUpgrade your engine's induction system with these high-quality aftermarket adapters designed to bridge the gap between cathedral port cylinder heads and rectangle port intake manifolds. These precision-engineered plates allow performance enthusiasts to utilize modern, high-flow intake designs on classic LS-series engine builds, providing a versatile solution for custom swaps and horsepower gains. This is a premium aftermarket component built for durability and ease of installation.\u003c\/p\u003e\u003ch3\u003eKey Features \u0026amp; Benefits\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eAllows seamless installation of rectangle port intakes (LS3, L92, L76) onto cathedral port cylinder heads.\u003c\/li\u003e\n\u003cli\u003ePrecision-machined from high-grade aluminum for a reliable, leak-free seal.\u003c\/li\u003e\n\u003cli\u003eOptimizes airflow transition between different port shapes for consistent performance.\u003c\/li\u003e\n\u003cli\u003eCost-effective aftermarket solution for custom engine builds and modernizing older powerplants.\u003c\/li\u003e\n\u003cli\u003eComplete set designed to withstand high engine temperatures and pressure.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCompatible Models\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eCompatible with LS-series engines featuring Cathedral Port Cylinder Heads.\u003c\/li\u003e\n\u003cli\u003eFits rectangle port intake manifolds found on LS3, L92, and L76 engines.\u003c\/li\u003e\n\u003cli\u003eReference part number: 551316.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eProduct Specifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003ePart Type: Intake Manifold Adapter Plates\u003c\/li\u003e\n\u003cli\u003eMaterial: Billet Aluminum\u003c\/li\u003e\n\u003cli\u003eHead Port Style: Cathedral\u003c\/li\u003e\n\u003cli\u003eIntake Port Style: Rectangle\u003c\/li\u003e\n\u003cli\u003eCondition: Brand New Aftermarket\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eIs this an OEM part?\u003c\/strong\u003e No, this is a premium aftermarket part designed to meet or exceed original equipment performance standards for custom applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow do I confirm compatibility?\u003c\/strong\u003e Please verify that your cylinder heads have the \"cathedral\" shaped ports and that your intake manifold is designed for \"rectangular\" ports. You should also cross-reference the part number 551316 with your specific build requirements.\u003c\/p\u003e\u003chr\u003e\u003cem\u003eImportant: This is a premium aftermarket part and is not manufactured by the original equipment manufacturer (OEM). Brand names and model numbers are used for reference purposes only. Compatibility may vary depending on the machine's serial number. Please verify fitment before purchase.\u003c\/em\u003e","brand":"DURAFORCE","offers":[{"title":"Default Title","offer_id":53377737392401,"sku":"ZZ2R00622","price":144.79,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0250\/2446\/2929\/files\/12_dddd835f-59b2-435f-bf1a-97cf21a48854.jpg?v=1775360281","url":"https:\/\/www.duraforce.com\/products\/for-551316-cathedral-port-cyl-head-to-rectangle-port-intake-manifold-adapters","provider":"DURAFORCE","version":"1.0","type":"link"}