{"product_id":"industrial-injection-reman-heads-04-5-05-gm-duramax-lly","title":"Industrial Injection Reman Heads 04.5-05 GM 6.6L Duramax LLY","description":"\u003cp\u003ePlanning on pushing the power levels of your Duramax engine? Whether you are starting on a full rebuild or just upgrading it's important to add strength and quality to the one place where you need it most: the engine! Industrial Injection's Remanufactured Heads for the Duramax LLY are a great place to start because every LLY Duramax cylinder head goes through a comprehensive remanufacturing process to ensure durability, performance, and reliability that meets or exceeds OEM standards. \u003cstrong\u003eSOLD AS A PAIR.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2\u003ePrecision Cleaning \u0026amp; Inspection Process\u003c\/h2\u003e\n\u003cp\u003eEach head is first jet washed in a high-pressure spray cabinet to remove oil, debris, and contaminants. The head is then glass beaded to eliminate carbon buildup and restore a clean surface.\u003c\/p\u003e\n\u003cp\u003eAfter cleaning, the head undergoes a detailed inspection process including magnaflux testing (for cast iron heads) or pressure testing to check for cracks and structural integrity. Finally, technicians perform a visual inspection for defects that could affect performance or reliability.\u003c\/p\u003e\n\u003cp\u003eNew high-strength alloy, heat-treated iron valve guides are installed in every remanufactured Duramax head. These guides are heat treated to Rockwell 22 “C” scale, delivering exceptional durability and wear resistance that exceeds many factory materials, including bronze guides.\u003c\/p\u003e\n\u003cp\u003eEach valve guide features a precision spiral groove designed to retain oil and improve valve lubrication during engine operation, helping extend engine life.\u003c\/p\u003e\n\u003ch2\u003eUpgraded Heat-Treated Valve Guides\u003c\/h2\u003e\n\u003cp\u003eThese \u003cstrong\u003eLLY Duramax heads\u003c\/strong\u003e receive \u003cstrong\u003enew high-strength alloy valve guides\u003c\/strong\u003e that are heat treated to \u003cstrong\u003eRockwell 22 “C” scale\u003c\/strong\u003e for maximum wear resistance.\u003c\/p\u003e\n\u003ch2\u003eDiamond Honed Valve Guide Precision\u003c\/h2\u003e\n\u003cp\u003eUnlike traditional reaming, the valve guides are \u003cstrong\u003eprecision honed using diamond abrasives\u003c\/strong\u003e to achieve exact tolerances. This process guarantees consistent guide diameter and geometry, superior surface finish, and precise valve alignment.\u003c\/p\u003e\n\u003ch2\u003eMulti-Angle Valve Job for Improved Airflow\u003c\/h2\u003e\n\n\u003cp\u003eEach remanufactured head receives a \u003cstrong\u003eprecision multi-angle valve job\u003c\/strong\u003e using a \u003cstrong\u003eSerdi 100 guide and seat machine\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003eThis advanced machining process:\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003eSimulates the \u003cstrong\u003etrue valve stem alignment\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eEnsures a \u003cstrong\u003eperfect valve-to-seat seal\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eHelps maximize \u003cstrong\u003eairflow in and out of the cylinder head\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eImproved airflow can support better \u003cstrong\u003eengine efficiency and combustion performance\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003ch2\u003ePrecision Machined Cylinder Head Surface\u003c\/h2\u003e\n\n\u003cp\u003eThe cylinder head deck surface is machined using \u003cstrong\u003eCBN or diamond tooling\u003c\/strong\u003e on a \u003cstrong\u003eBerco milling machine\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003eThis allows precise control of the surface finish to ensure compatibility with various head gasket types, including:\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eMLS (Multi-Layer Steel) head gaskets\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003ePerformance gasket materials\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eA properly machined surface helps ensure \u003cstrong\u003ereliable sealing and long-term engine durability\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003ch2\u003eFinal Assembly\u003c\/h2\u003e\n\n\u003cp\u003eAfter machining is complete, each \u003cstrong\u003eLLY Duramax remanufactured cylinder head\u003c\/strong\u003e is:\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003eJet washed again for final cleaning\u003c\/li\u003e\n\u003cli\u003eThoroughly dried\u003c\/li\u003e\n\u003cli\u003eCarefully assembled with \u003cstrong\u003enew valve seals and valve springs\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eThe result is a \u003cstrong\u003ehigh-quality stock replacement Duramax cylinder head\u003c\/strong\u003e designed for dependable performance.\u003c\/p\u003e\n","brand":"Industrial Injection","offers":[{"title":"Default Title","offer_id":53083358789997,"sku":"IIS-PDM-LLYSH","price":1697.45,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0892\/2487\/2301\/files\/duramax_2_heads_1800x1800_cf4add63-3195-47aa-8251-e6dd9bcae070.jpg?v=1772734656","url":"https:\/\/dieselpowerproducts.com\/products\/industrial-injection-reman-heads-04-5-05-gm-duramax-lly","provider":"Diesel Power Products","version":"1.0","type":"link"}