{"product_id":"ppe-cast-iron-cylinder-head-110100101-2001-2004-6-6l-duramax-lb7","title":"PPE CAST IRON CYLINDER HEAD 110100101 | 2001-2004 6.6L Duramax LB7","description":"\u003cp\u003eUpgrade the durability and performance of your 2001–2004 GM 6.6L Duramax LB7 with the PPE 110100101 Cast Iron Cylinder Head. Engineered as a heavy-duty replacement for cracked or damaged factory cylinder heads, this performance-oriented design utilizes specialty alloyed gray cast iron construction to provide exceptional strength and long-term reliability.\u003c\/p\u003e\n\u003cp\u003eUnlike factory aluminum heads, this cast iron design helps minimize expansion-rate differences between the cylinder head and engine block, promoting more consistent clamping force and improved durability in high-performance and heavy-duty applications.\u003c\/p\u003e\n\u003cp\u003eThe valvetrain features premium materials throughout, including chromoly-silicone alloy intake valves, nitrided 214N alloy exhaust valves, chromoly steel retainers, spring seats, and 125 lb conical valve springs.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Benefits:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHeavy-duty cast iron construction for increased durability\u003c\/li\u003e\n\u003cli\u003eDesigned to withstand demanding performance applications\u003c\/li\u003e\n\u003cli\u003eCast-in injector cups eliminate injector cup leakage concerns\u003c\/li\u003e\n\u003cli\u003ePremium valvetrain components for long service life\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCast in the USA\u003c\/li\u003e\n\u003cli\u003eSpecialty alloyed gray cast iron construction\u003c\/li\u003e\n\u003cli\u003eChromoly-silicone alloy intake valves\u003c\/li\u003e\n\u003cli\u003e214N alloy exhaust valves\u003c\/li\u003e\n\u003cli\u003eNitrided intake and exhaust valves for increased durability\u003c\/li\u003e\n\u003cli\u003e125 lb conical valve springs\u003c\/li\u003e\n\u003cli\u003eCNC-machined chromoly steel retainers and spring seats\u003c\/li\u003e\n\u003cli\u003eCast-in injector cups\u003c\/li\u003e\n\u003cli\u003eIncludes freeze plugs\u003c\/li\u003e\n\u003cli\u003eRocker shaft and rocker box dowels preinstalled\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\u003eUpgraded pushrods are recommended for performance applications.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Pacific Performance Engineering","offers":[{"title":"Default Title","offer_id":52377402835227,"sku":"110100101","price":1349.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0962\/5757\/3147\/files\/Screenshot2026-06-19at11.37.11AM.png?v=1781890656","url":"https:\/\/wwmperformance.com\/products\/ppe-cast-iron-cylinder-head-110100101-2001-2004-6-6l-duramax-lb7","provider":"WWM Performance","version":"1.0","type":"link"}