{"product_id":"dart-iron-eagle-s-s-small-block-chevy-cylinder-heads-2","title":"Dart Iron Eagle S\/S Small Block Chevy Cylinder Heads","description":"Stock replacement, street and strip performance, or towing upgrade with mildly modified engines from idle to 5,500 RPM. Best for 305-383 cubic inch engines. Works with most standard components. Dart Iron Eagle S\/S 23 Deg 165cc heads produce great throttle response and low to mid-range torque for street performance engines. Our precision cast ports and chambers produce outstanding air flow without time consuming porting. Dart S\/S heads are legal in many racing sanctions with Iron head rules. Assemblies include Stainless Steel valves, premium springs, locks, retainers, and seals. Guide plates not included for self-aligning rocker styles.","brand":"Dart","offers":[{"title":"Default Title","offer_id":67609126142120,"sku":"BGWK_10024267","price":394.05,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0402\/2344\/1064\/files\/10021070-ANG135_5fbb326d-63cb-4846-9c6c-b88fc977a4d1.jpg?v=1791234357","url":"https:\/\/www.truspeedperformance.com\/products\/dart-iron-eagle-s-s-small-block-chevy-cylinder-heads-2","provider":"TruSpeed Performance LLC","version":"1.0","type":"link"}