{"product_id":"nor-19574030m-pro1-aluminum-big-block-chevy-marine-coated-cylinder-heads","title":"DART 19574030M Pro1 Aluminum Big Block Chevy Marine Coated Cylinder Heads","description":"\u003cp\u003eMaximum performance, bracket racing, heads up and super classes. Over 7,500 RPM, 500+ cubic inches, a great head for maximum effort comp or bracket cars. Dart's PRO2 24 Deg 380cc CNC heads have been revised with larger 2.350 in. intake valves and a revised port design for improved airflow and a substantial horsepower increase! These cylinder heads were designed to make competitive engine building easier and less expensive by incorporating the rugged features of our famous Race Series casting into a ready to use, professional quality competition cylinder head. Every intake port, every exhaust runner, every valve bowl, and every combustion chamber is 100% digitally CNC machined for the ultimate in consistency. Assemblies include Stainless Steel valves, premium springs, locks, retainers, guide plates and seals.\u003c\/p\u003e\n\u003cp\u003eDart Pro1 Aluminum Big Block Chevy Marine Coated Cylinder Heads\u003c\/p\u003e\n\u003cp\u003ePlease review Specifications and the detailed fitment table for notes and exceptions.\u003c\/p\u003e\n\u003ch3\u003eSpecifications:\u003c\/h3\u003e\u003ctable class=\"specs\"\u003e\u003ctbody\u003e\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003ctd\u003eDart Pro1 Aluminum Big Block Chevy Marine Coated Cylinder Heads\u003c\/td\u003e\n\u003c\/tr\u003e\u003c\/tbody\u003e\u003c\/table\u003e","brand":"DART","offers":[{"title":"Default Title","offer_id":53300693467349,"sku":"ds_BGWK_19574030M","price":4092.99,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0663\/8999\/9829\/files\/BBC_PRO1_335-355-365cc-Head-ANG135_f8f2737b-cee3-4c81-bdbd-6d62f17d08f4.jpg?v=1771967249","url":"https:\/\/shdp.ca\/products\/nor-19574030m-pro1-aluminum-big-block-chevy-marine-coated-cylinder-heads","provider":"SHDP Truck \u0026 Auto","version":"1.0","type":"link"}