{"product_id":"nor-19200030-pro1-aluminum-big-block-chevy-cylinder-heads","title":"DART 19200030 Pro1 Aluminum Big Block Chevy Cylinder Heads","description":"\u003cp\u003eSerious street performance, mild bracket racing, and marine. Over 7,000 RPM, 525+ cubic inches. Can be used on smaller engines with a tight converter. The PRO1 24 Deg 325cc delivers increased airflow at high valve lift for high RPM, big cubic inch engines, and still remains compatible 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. Best of all, our precision cast ports produce outstanding airflow without time consuming porting. Assemblies include Stainless Steel valves, premium springs, locks, retainers, guide plates and seals.\u003c\/p\u003e\n\u003cp\u003eDart Pro1 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 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":53300692418773,"sku":"ds_BGWK_19200030","price":2398.99,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0663\/8999\/9829\/files\/19100030-ANG135_cb76adac-a179-455b-87dd-a1474332e666.jpg?v=1771967248","url":"https:\/\/shdp.ca\/products\/nor-19200030-pro1-aluminum-big-block-chevy-cylinder-heads","provider":"SHDP Truck \u0026 Auto","version":"1.0","type":"link"}