{"product_id":"dart-19574030-bbc-355cc-cnc-pro-1-head-121cc-r-p-2-30-1-88-bare","title":"DART 19574030 Pro1 CNC Aluminum Big Block Chevy 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 CNC Aluminum Big Block Chevy 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 CNC Aluminum Big Block Chevy Cylinder Heads\u003c\/td\u003e\n\u003c\/tr\u003e\u003c\/tbody\u003e\u003c\/table\u003e","brand":"DART","offers":[{"title":"Default Title","offer_id":48923477213397,"sku":"ds_BGWK_19574030","price":3411.99,"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.jpg?v=1771967220","url":"https:\/\/shdp.ca\/products\/dart-19574030-bbc-355cc-cnc-pro-1-head-121cc-r-p-2-30-1-88-bare","provider":"SHDP Truck \u0026 Auto","version":"1.0","type":"link"}