{"product_id":"ppe-cast-iron-ported-cylinder-head-110100111-2001-2004-6-6l-duramax-lb7","title":"PPE CAST IRON PORTED CYLINDER HEAD 110100111 | 2001-2004 6.6L Duramax LB7","description":"\u003cp\u003eUpgrade the durability, airflow, and performance of your 2001–2004 GM 6.6L Duramax LB7 with the PPE 110100111 Cast Iron Ported Cylinder Head. Designed to eliminate the common weaknesses of the factory aluminum cylinder heads, this premium cylinder head combines heavy-duty cast iron construction with precision CNC porting for improved reliability and increased airflow.\u003c\/p\u003e\n\u003cp\u003eManufactured from specially alloyed gray cast iron, this cylinder head offers superior resistance to heat, fatigue, and thermal cycling. Unlike the factory aluminum heads, the cast iron construction shares the same expansion characteristics as the Duramax engine block, helping eliminate head gasket scrubbing and reducing the risk of blown head gaskets.\u003c\/p\u003e\n\u003cp\u003eThe CNC-ported intake and exhaust runners are machined using a 5-axis process to improve airflow efficiency, helping increase horsepower, torque, throttle response, and overall engine efficiency while reducing turbo lag.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Benefits:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eEliminates common factory cylinder head cracking and warping concerns\u003c\/li\u003e\n\u003cli\u003eImproves airflow for increased performance and efficiency\u003c\/li\u003e\n\u003cli\u003eReduces the risk of head gasket failure\u003c\/li\u003e\n\u003cli\u003eProvides exceptional durability in high-performance applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSpecially alloyed gray cast iron construction\u003c\/li\u003e\n\u003cli\u003e5-axis CNC-ported intake and exhaust ports\u003c\/li\u003e\n\u003cli\u003eFully nitrided valves for increased wear resistance\u003c\/li\u003e\n\u003cli\u003ePremium 21-4N Stellite-reinforced exhaust valves\u003c\/li\u003e\n\u003cli\u003eCast-in fuel injector cups eliminate injector cup leakage issues\u003c\/li\u003e\n\u003cli\u003eHigher fatigue strength and heat resistance than factory aluminum heads\u003c\/li\u003e\n\u003cli\u003eImproved thermal efficiency\u003c\/li\u003e\n\u003cli\u003eReduced engine noise and vibration\u003c\/li\u003e\n\u003cli\u003eLiquid-cooled cylinder head design\u003c\/li\u003e\n\u003cli\u003eIncludes rocker arm dowels and freeze plugs\u003c\/li\u003e\n\u003cli\u003eReady-to-install configuration\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eFitment:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e2001–2004 GM Silverado\/Sierra 2500HD \u0026amp; 3500HD 6.6L Duramax LB7\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNotes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSold individually. Two cylinder heads are required per engine.\u003c\/li\u003e\n\u003cli\u003eFor extreme-performance applications, PPE recommends oversized exhaust valve seats with increased interference fit.\u003c\/li\u003e\n\u003cli\u003eCannot be shipped to California.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Pacific Performance Engineering","offers":[{"title":"Default Title","offer_id":52377774358811,"sku":"110100111","price":1709.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0962\/5757\/3147\/files\/Screenshot2026-06-19at2.09.38PM.png?v=1781899814","url":"https:\/\/wwmperformance.com\/products\/ppe-cast-iron-ported-cylinder-head-110100111-2001-2004-6-6l-duramax-lb7","provider":"WWM Performance","version":"1.0","type":"link"}