{"product_id":"dfc-diesel-kore6604505llysoalbcc-kore-series-speed-of-air-callies-crankshaft-long-block-std-auto-2004-5-2005-gm-sierra-silverado-2500hd-3500hd-6-6l-duramax-lly","title":"DFC Diesel KORE6604505LLYSOALBCC Kore Series Speed of Air Callies Crankshaft Long Block (STD\/Auto) | 2004.5-2005 GM Sierra\/Silverado 2500HD\/3500HD 6.6L Duramax LLY","description":"\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eUpgraded Callies Compstar-Durastar crankshaft included\u003c\/li\u003e\n\u003cli\u003eDeep DuraCase nitride treatment for durability\u003c\/li\u003e\n\u003cli\u003eDrilled rod journals for reduced inertia\u003c\/li\u003e\n\u003cli\u003eAccepts OEM flywheels and flexplates\u003c\/li\u003e\n\u003cli\u003eNew Mahle pistons, main and rod bearings\u003c\/li\u003e\n\u003cli\u003eTotal Seal gapless piston rings\u003c\/li\u003e\n\u003cli\u003eNew valves, seats, and guides\u003c\/li\u003e\n\u003cli\u003eMachined to OEM or better specs\u003c\/li\u003e\n\u003cli\u003eBuilt in ISO 9001:2015 certified facility\u003c\/li\u003e\n\u003cli\u003e1 year unlimited mileage parts warranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eAddressing The Duramax's Most Catastrophic Failure Point\u003c\/h4\u003e\n\u003cp\u003eAsk any Duramax owner about the scariest failure on this platform, and a broken factory crankshaft usually tops the list. The DFC Diesel KORE Series Speed of Air Callies Crankshaft Long Block was built specifically to take that risk off the table, pairing an upgraded Callies Compstar-Durastar crankshaft with the value focused Mahle component package that defines the Speed of Air line. The crankshaft features a deep DuraCase nitride treatment for enhanced wear resistance, along with True Form fillet radii across every journal to reduce stress concentration under load, and drilled rod journals for reduced inertia and easier balancing. Because it retains OEM stroke, journal diameters, and accepts OEM post and flange bolts along with OEM flywheels and flexplates, this crankshaft upgrade drops in without forcing you to source specialty supporting parts. This long block gives 2004.5-2005 GM Silverado and Sierra 2500HD and 3500HD owners genuine bottom end strength alongside new Mahle pistons, Mahle main and rod bearings, and Total Seal gapless piston rings, all at a more accessible price point than DFC's full standard build.\u003c\/p\u003e\n\u003ch4\u003eCallies Engineering Paired With Genuine Mahle Components\u003c\/h4\u003e\n\u003cp\u003eThe DFC Diesel KORE6604505LLYSOALBCC is a remanufactured long block engineered specifically for 2004.5-2005 GM Silverado and Sierra 2500HD and 3500HD trucks equipped with the 6.6L Duramax LLY engine, built around an upgraded Callies Compstar-Durastar crankshaft in place of the factory unit. This crankshaft is constructed from hardened 4340 steel with a deep DuraCase nitride treatment, drilled rod journals for reduced inertia, and True Form fillet radii polished to a 6Ra or finer finish across every journal. The crankshaft maintains a 3.898 inch stroke with OEM journal diameters and width, uses a dual keyed damper fit, and includes lead-in oil holes at the main bearings for improved cold start oil flow to the rod journals. The long block assembly includes new Mahle pistons, new Mahle main bearings, and new Mahle rod bearings, paired with Total Seal gapless rings for improved sealing compared to standard ring designs. New valves, seats, and guides are installed during the rebuild, along with new front and rear main seals, and every component is professionally machined to meet or exceed OEM specifications. The KORE Series is manufactured in an ISO 9001:2015 certified facility, and unlike DFC's standard engine line, it carries a 1 year unlimited mileage parts-only warranty that applies to both personal and commercial use.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFitment:\u003c\/strong\u003e 2004.5, 2005 GM Silverado\/Sierra 2500HD\/3500HD 6.6L Duramax LLY\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNotes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBuilt with an upgraded Callies Compstar-Durastar crankshaft, not the factory unit\u003c\/li\u003e\n\u003cli\u003eCrankshaft retains OEM stroke, journal diameters, and accepts OEM flywheels\/flexplates\u003c\/li\u003e\n\u003cli\u003eWarranty is parts-only, 1 year unlimited mileage, for both standard and commercial use\u003c\/li\u003e\n\u003cli\u003eComponent brands may vary by build based on parts availability, cannot be specially requested\u003c\/li\u003e\n\u003cli\u003e$500 shipping charge\/$2,800 core charge \u003c\/li\u003e\n\u003cli\u003eEngine shipping crate must be returned with core engine for full core credit\u003c\/li\u003e\n\u003cli\u003eThis product cannot be shipped to California\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.xtremediesel.com\/mm5\/warranty\/DFC_Engines_Owners-Guide.pdf\" target=\"_blank\" rel=\"noopener\"\u003e\u003cstrong\u003eInstall Instructions\u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e","brand":"DFC Diesel","offers":[{"title":"Default Title","offer_id":54627440361756,"sku":"DDUKORE6604505LLYSOALBCC","price":11942.66,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/dfc-diesel-soa-series-long-block-crate-engine-2004.5-2005-gm-6.6l-lly-duramax-6604505llysoalb__01877.1719342291.1280.1280__31813.1765206937.1280.1280__66625_78f88384-c2b0-43b1-add1-fbc4d51acad0.webp?v=1790783789","url":"https:\/\/www.alligatorperformance.com\/products\/dfc-diesel-kore6604505llysoalbcc-kore-series-speed-of-air-callies-crankshaft-long-block-std-auto-2004-5-2005-gm-sierra-silverado-2500hd-3500hd-6-6l-duramax-lly","provider":"Alligator Performance","version":"1.0","type":"link"}