{"product_id":"dfc-diesel-th660607lbzsoalb","title":"DFC Diesel TH660607LBZSOALB Tow\/Haul Series Speed Of Air Long Block (Standard\/Auto) | 2006-2007 GM\/Chevrolet 2500HD\/3500HD 6.6L Duramax LBZ","description":"\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e5-year \/ 160,000 km warranty coverage\u003c\/li\u003e\n\u003cli\u003eBuilt for towing and hauling up to 500HP\u003c\/li\u003e\n\u003cli\u003eIncludes Stage 2 performance camshaft\u003c\/li\u003e\n\u003cli\u003eMahle Motorsports heavy-duty pistons installed\u003c\/li\u003e\n\u003cli\u003eManton heavy-duty push rods for strength\u003c\/li\u003e\n\u003cli\u003eHD valve springs for improved durability\u003c\/li\u003e\n\u003cli\u003eARP or OptiTorque head studs included\u003c\/li\u003e\n\u003cli\u003eTotal Seal gapless piston rings standard\u003c\/li\u003e\n\u003cli\u003eAdded crankshaft dowels for balancer stability\u003c\/li\u003e\n\u003cli\u003eEDM doweled oil pump gear for reliability\u003c\/li\u003e\n\u003cli\u003eCylinder heads resurfaced and magnafluxed\u003c\/li\u003e\n\u003cli\u003eComplete top-end gasket kit included\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eBuilt To Pull Strong And Last Long\u003c\/h4\u003e\n\u003cp\u003eWhen your 2006-2007 GM or Chevrolet 2500HD or 3500HD with the 6.6L Duramax LBZ is used for serious towing and hauling, you need more than a stock replacement. The DFC Diesel Tow\/Haul Series Long Block is built with the strength and upgrades to handle demanding loads up to 500HP at the flywheel. This engine includes all the proven improvements from DFC’s Street Series, then adds heavy-duty enhancements like Mahle Motorsports pistons, Manton HD push rods, and reinforced valve springs for long-term reliability under load. The Stage 2 performance camshaft boosts both pulling power and throttle response, giving your truck the extra edge it needs on steep grades or when hauling full trailers. ARP or OptiTorque head studs lock down cylinder pressure, while Total Seal gapless piston rings improve efficiency and sealing. It is backed by a 5-year or 160,000 km warranty, so you can run your truck with confidence in any work or recreational setting. This is the build you want when you need your engine to work as hard as you do.\u003c\/p\u003e\n\u003ch4\u003eEngineered For Heavy Loads And Lasting Performance\u003c\/h4\u003e\n\u003cp\u003eThe DFC Diesel TH660607LBZSOALB Tow\/Haul Series Long Block starts with the same foundation as the Street Series, using a fully remanufactured block that is machined and bored for next over-sized pistons. Mahle Motorsports heavy-duty pistons are installed for maximum durability under high cylinder pressures. The rotating assembly benefits from added crankshaft dowels that improve harmonic balancer and trigger gear stability, reducing the risk of movement under extreme loads. A Stage 2 performance camshaft and Manton HD push rods work with reinforced valve springs to provide smooth, consistent operation in high-demand towing and hauling applications. ARP or OptiTorque head studs ensure a secure seal under heavy boost, while Total Seal gapless piston rings enhance compression and reduce blow-by. Cylinder heads are fully reconditioned with new seats, guides, valves, and stem seals, then resurfaced and magnafluxed for reliability. Every build is completed with a full top-end gasket kit, making installation straightforward and helping ensure your engine is ready for years of dependable service.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e Fits: \u003c\/strong\u003e 2006, 2007 GM\/Chevrolet 2500HD\/3500HD 6.6L Duramax LBZ\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNotes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDesigned for 2006-2007 GM\/Chevrolet 2500HD and 3500HD with 6.6L Duramax LBZ\u003c\/li\u003e\n\u003cli\u003eTow\/Haul Series is built for towing and hauling applications up to 500HP\u003c\/li\u003e\n\u003cli\u003eIncludes all upgrades found in the Street Series build\u003c\/li\u003e\n\u003cli\u003eEngine is a remanufactured long block, not a complete drop-in\u003c\/li\u003e\n\u003cli\u003eEquipped with Mahle Motorsports heavy-duty pistons for durability\u003c\/li\u003e\n\u003cli\u003eFeatures a Stage 2 performance camshaft for added power\u003c\/li\u003e\n\u003cli\u003eManton heavy-duty push rods and HD valve springs included\u003c\/li\u003e\n\u003cli\u003eAdded crankshaft dowels for improved harmonic balancer stability\u003c\/li\u003e\n\u003cli\u003eBuilt with all new OEM or equivalent internal components\u003c\/li\u003e\n\u003cli\u003eCylinder heads are resurfaced, magnafluxed, and fully reconditioned\u003c\/li\u003e\n\u003cli\u003eBacked by a 5-year \/ 160,000 km manufacturer warranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-end=\"931\" data-start=\"884\"\u003eStreet Series vs Tow\/Haul vs Tow\/Haul HD\u003c\/h3\u003e\n\u003cul data-end=\"1398\" data-start=\"933\"\u003e\n\u003cli data-end=\"1099\" data-start=\"933\"\u003e\n\u003cp data-end=\"1099\" data-start=\"935\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003eStreet Series:\u003c\/span\u003e Ideal for daily driving, light work, and diesel enthusiasts. Focuses on reliability upgrades over stock, with head stud and sealing improvements.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1240\" data-start=\"1100\"\u003e\n\u003cp data-end=\"1240\" data-start=\"1102\"\u003e\u003cstrong\u003e\u003cspan style=\"text-decoration: underline;\"\u003eTow\/Haul Series:\u003c\/span\u003e All Street upgrades plus added performance parts for higher load and towing power. Supports builds up to ~700 HP.\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1398\" data-start=\"1241\"\u003e\n\u003cp data-end=\"1398\" data-start=\"1243\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003eTow\/Haul HD Series:\u003c\/span\u003e The most robust option. Adds heavy-duty internals like Wagler rods and a balanced rotating assembly for 800+ HP capability.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-end=\"1445\" data-start=\"1405\"\u003eStandard\/Auto vs Standard vs Auto\u003c\/h3\u003e\n\u003cul data-end=\"1706\" data-start=\"1447\"\u003e\n\u003cli data-end=\"1557\" data-start=\"1447\"\u003e\n\u003cp data-end=\"1557\" data-start=\"1449\"\u003e\u003cstrong\u003e\u003cspan style=\"text-decoration: underline;\"\u003eStandard\/Auto:\u003c\/span\u003e Compatible with both manual and automatic transmissions. Offers the most flexibility.\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1636\" data-start=\"1558\"\u003e\n\u003cp data-end=\"1636\" data-start=\"1560\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003eStandard:\u003c\/span\u003e Built specifically for manual transmission configurations.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1706\" data-start=\"1637\"\u003e\n\u003cp data-end=\"1706\" data-start=\"1639\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003eAuto\u003c\/span\u003e: Built specifically for automatic transmission setups.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"DFC Diesel","offers":[{"title":"Default Title","offer_id":68060705095953,"sku":"DDU-TH660607LBZSOALB","price":20381.25,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0692\/0477\/1089\/files\/dfc-diesel-long-block-crate-engine-2001-2004-gm-6.6l-lb7-duramax-660104lb7lb__48046_f7fe0f8c-75ac-4159-a842-26846efbc45f.jpg?v=1794721772","url":"https:\/\/gautoparts.com\/products\/dfc-diesel-th660607lbzsoalb","provider":"Guaranteed Auto Parts","version":"1.0","type":"link"}