{"product_id":"dart-19300030-pro1-chevrolet-big-block-head-34500-cc-port-12100-cc-chamber","title":"Dart 19300030 - Pro1 Aluminum Big Block Chevy Cylinder Heads","description":"\u003cp\u003eDart 19300030 - Pro1 Aluminum Big Block Chevy Cylinder Heads\u003c\/p\u003e\u003cp\u003eCylinder Head - Pro 1 - Bare - 2.300 \/ 1.880 in Valves - 345 cc Intake - 121 cc Chamber - Straight Plug - Aluminum - Big Block Chevy - Each\u003c\/p\u003e\u003cp\u003eDart Pro1 Aluminum Big Block Chevy Cylinder Heads\u003c\/p\u003e\u003cp\u003eMaximum street or marine performance, bracket racing, heads up and super classes. Over 7,000 RPM, 540+ cubic inches. The PRO1 24 Deg 345cc cylinder head is for uncompromising performance and racing applications which favor high RPM power over low end flexibility. Best for big cubic inch, high RPM use. Rolled valve angles, improved spark plug location, extra long intake valves, raised exhaust ports, and fast burn chambers. Works with off the shelf pistons, valve train components, and intake manifolds. Long wearing Bronze valve guides, screw-in studs, multi-angle intake seats with hardened, radiused exhaust seats are standard. Assemblies include Stainless Steel valves, premium springs, locks, retainers, guide plates and seals.\u003c\/p\u003e\u003cul\u003e\u003cli\u003eHeads are sold individually\u003c\/li\u003e\u003c\/ul\u003e\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eIndustry\u003c\/strong\u003e: \u003cspan\u003eAutomotive\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eCNC Ported\u003c\/strong\u003e: \u003cspan\u003eYes\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eCombustion Chamber Volume\u003c\/strong\u003e: \u003cspan\u003e121.00\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eExhaust Valve Diameter\u003c\/strong\u003e: \u003cspan\u003e1.880\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eIntake Valve Diameter\u003c\/strong\u003e: \u003cspan\u003e2.300\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: \u003cspan\u003eRMR Cast Aluminum Alloy\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003ePort Volume\u003c\/strong\u003e: \u003cspan\u003e345.00\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eValve Angle\u003c\/strong\u003e: \u003cspan\u003e24\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eEngine Type\u003c\/strong\u003e: \u003cspan\u003eICE\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eValve Spring Type\u003c\/strong\u003e: \u003cspan\u003eBare\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eProduct Type\u003c\/strong\u003e: \u003cspan\u003eEngine Cylinder Head\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eMake\u003c\/strong\u003e: \u003cspan\u003eChevrolet\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eEngine\u003c\/strong\u003e: \u003cspan\u003eBig Block\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eCylinder Head Series\u003c\/strong\u003e: \u003cspan\u003ePro1\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eCylinder Head Material\u003c\/strong\u003e: \u003cspan\u003eRMR Cast Aluminum Alloy\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eIntake Runner Volume\u003c\/strong\u003e: \u003cspan\u003e345.00\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Dart","offers":[{"title":"Default Title","offer_id":47290558840970,"sku":"BGWK-19300030","price":1558.34,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/0619\/2778\/files\/0_19100030-ang135_normalized_d0be7639-9e4d-45d0-8031-2fcc495ab9cf.jpg?v=1776296072","url":"https:\/\/www.onlyinstock.com\/products\/dart-19300030-pro1-chevrolet-big-block-head-34500-cc-port-12100-cc-chamber","provider":"Only In Stock","version":"1.0","type":"link"}