{"product_id":"dart-pro1-ls-280cc-68cc-cylinder-heads-assembled-pair-11030153","title":"Dart Pro1 LS 15° Cylinder Heads 280cc 68cc Assembled (Pair) | 2.165\/1.600 Valves | GM LS Performance Heads","description":"\u003cp\u003e\nTake your LS build to the next level with this \u003cstrong\u003epair of Dart Pro1 LS 15 Degree Assembled Cylinder Heads (DRT11030153)\u003c\/strong\u003e. Designed for serious street and race applications, these high-performance aluminum cylinder heads deliver exceptional airflow, durability, and horsepower potential for GM LS-based engines.\n\u003c\/p\u003e\n\n\u003cp\u003e\nEach head features a \u003cstrong\u003e280cc intake runner\u003c\/strong\u003e and \u003cstrong\u003e68cc combustion chamber\u003c\/strong\u003e, making them ideal for high-horsepower builds. Sold as a \u003cstrong\u003ematched pair\u003c\/strong\u003e, these heads come fully assembled and ready to install with premium valvetrain components.\n\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eSold as a \u003cstrong\u003ecomplete pair (2 cylinder heads)\u003c\/strong\u003e\n\u003c\/li\u003e\n  \u003cli\u003eHigh-flow 280cc intake runners for maximum airflow and horsepower\u003c\/li\u003e\n  \u003cli\u003e68cc combustion chambers ideal for performance LS builds\u003c\/li\u003e\n  \u003cli\u003eFully assembled with valves, springs, retainers, and seals\u003c\/li\u003e\n  \u003cli\u003eCompatible with hydraulic roller camshafts up to .650\" lift\u003c\/li\u003e\n  \u003cli\u003ePremium aluminum construction for strength and reduced weight\u003c\/li\u003e\n  \u003cli\u003eDesigned for GM LS-series engines\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications (Per Head)\u003c\/h3\u003e\n\u003ctable border=\"1\" cellpadding=\"6\" cellspacing=\"0\"\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDRT11030153\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct Line\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDart Pro1 LS 15 Degree\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eConfiguration\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAssembled\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCombustion Chamber Volume\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e68cc\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIntake Runner Volume\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e280cc\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExhaust Runner Volume\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e102cc\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIntake Valve Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2.165\"\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExhaust Valve Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1.600\"\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMax Valve Lift\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e.650\"\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eValve Springs\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDual, 1.295\" Diameter\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eValve Retainers\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTitanium\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eValve Guide Material\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eManganese Bronze\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eValve Seat Material\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDuctile Iron\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eValve Angle\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e15 Degree Intake \/ Exhaust\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCamshaft Compatibility\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHydraulic Roller\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePort Shape\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRectangle Intake \/ Square Exhaust\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFinish\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNatural Aluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cp\u003e\nDesigned for \u003cstrong\u003eGM LS-series engines\u003c\/strong\u003e. Ideal for high-performance street, strip, and racing applications requiring increased airflow and horsepower.\n\u003c\/p\u003e\n\n\u003ch3\u003eImportant Notes\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eThis listing is for a \u003cstrong\u003epair of cylinder heads (2 total)\u003c\/strong\u003e\n\u003c\/li\u003e\n  \u003cli\u003eProfessional installation recommended\u003c\/li\u003e\n  \u003cli\u003eVerify compatibility with your specific LS build before purchase\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy Buy From Lee Motorsports?\u003c\/h3\u003e\n\u003cp\u003e\nAt \u003cstrong\u003eLee Motorsports\u003c\/strong\u003e, we specialize in high-performance parts for serious builds. Whether you're chasing ETs at the track or building a street machine, we supply components that perform when it matters most.\n\u003c\/p\u003e","brand":"Dart","offers":[{"title":"Default Title","offer_id":52870735724844,"sku":"DRT11030153","price":3299.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0698\/6429\/2652\/files\/dart-pro1-ls-cylinder-heads-280cc-68cc-assembled-pair-gm-ls-performance.png?v=1776374144","url":"https:\/\/www.lee-motorsports.com\/products\/dart-pro1-ls-280cc-68cc-cylinder-heads-assembled-pair-11030153","provider":"Lee Motorsports","version":"1.0","type":"link"}