{"product_id":"ppe-cast-iron-cylinder-head-110100105-2011-2016-6-6l-duramax-lml","title":"PPE CAST IRON CYLINDER HEAD 110100105 | 2011-2016 6.6L Duramax LML","description":"\u003cp\u003eUpgrade the reliability and durability of your 2011–2016 GM 6.6L Duramax LML with the PPE 110100105 Cast Iron Cylinder Head. Engineered to address common issues associated with factory aluminum cylinder heads, this heavy-duty replacement is cast from specially alloyed gray iron and designed to withstand extreme temperatures, high cylinder pressures, and demanding performance applications.\u003c\/p\u003e\n\u003cp\u003eUnlike factory aluminum heads, the PPE Cast Iron Cylinder Head shares a similar expansion rate with the OEM cast iron engine block. This helps eliminate the head gasket scrubbing commonly associated with mixed-metal engine designs, reducing the likelihood of head gasket failure while improving long-term sealing performance.\u003c\/p\u003e\n\u003cp\u003eEvery cylinder head comes assembled with upgraded valvetrain components, including fully nitrided valves, tapered valve springs, chromoly steel retainers, and premium valve seats designed for exceptional durability and heat resistance. Cast-in injector cups further improve reliability by eliminating potential injector cup seal failures.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Benefits:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eEliminates common head gasket scrubbing issues\u003c\/li\u003e\n\u003cli\u003eProvides superior durability in high-heat applications\u003c\/li\u003e\n\u003cli\u003eReduces the risk of warped or cracked cylinder heads\u003c\/li\u003e\n\u003cli\u003eImproves long-term engine reliability and performance\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\u003eSame thermal expansion rate as the OEM iron engine block\u003c\/li\u003e\n\u003cli\u003eChrome-silicon alloy intake valves\u003c\/li\u003e\n\u003cli\u003ePremium 21-4N Stellite-reinforced exhaust valves\u003c\/li\u003e\n\u003cli\u003eFully nitrided intake and exhaust valves\u003c\/li\u003e\n\u003cli\u003eUpgraded tapered valve springs\u003c\/li\u003e\n\u003cli\u003eHigh-strength chromoly steel CNC-machined retainers and spring locators\u003c\/li\u003e\n\u003cli\u003ePowdered metal valve seats for superior heat and wear resistance\u003c\/li\u003e\n\u003cli\u003eCast-in fuel injector cups eliminate injector cup seal failures\u003c\/li\u003e\n\u003cli\u003eReduced engine noise compared to factory aluminum heads\u003c\/li\u003e\n\u003cli\u003eImproved thermal efficiency and durability\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eFitment:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e2011–2016 GM Silverado\/Sierra 2500HD \u0026amp; 3500HD 6.6L Duramax LML\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eImportant Notes:\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 additional interference fit for maximum durability.\u003c\/li\u003e\n\u003cli\u003eThe cylinder head is designed to fit either bank. Freeze plugs are installed during assembly based on application requirements.\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":52377631752475,"sku":"110100105","price":1349.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0962\/5757\/3147\/files\/Screenshot2026-06-19at1.12.25PM.png?v=1781896383","url":"https:\/\/wwmperformance.com\/products\/ppe-cast-iron-cylinder-head-110100105-2011-2016-6-6l-duramax-lml","provider":"WWM Performance","version":"1.0","type":"link"}