{"product_id":"dfc-diesel-ss660104lb7tksoalb-street-series-speed-of-air-long-block-standard-auto-2001-2004-gm-chevrolet-2500hd-3500hd-6-6l-duramax-lb7-topkick","title":"DFC Diesel SS660104LB7TKSOALB Street Series Speed Of Air Long Block (Standard\/Auto) | 2001-2004 GM\/Chevrolet 2500HD\/3500HD 6.6L Duramax LB7 TOPKICK","description":"\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFits 2001–2004 TopKick 6.6L LB7 engines\u003c\/li\u003e\n\u003cli\u003eBacked by 5-year, 160,000 km warranty\u003c\/li\u003e\n\u003cli\u003eIncludes remanufactured long block assembly\u003c\/li\u003e\n\u003cli\u003eAll new OEM-grade internal engine components\u003c\/li\u003e\n\u003cli\u003eMachined using advanced Rottler equipment\u003c\/li\u003e\n\u003cli\u003eProfessionally bored for oversized pistons\u003c\/li\u003e\n\u003cli\u003eARP or OptiTorque head studs installed\u003c\/li\u003e\n\u003cli\u003eTotal Seal gapless piston rings included\u003c\/li\u003e\n\u003cli\u003eReman heads with new valves and guides\u003c\/li\u003e\n\u003cli\u003eTop-end gasket kit included for installation\u003c\/li\u003e\n\u003cli\u003eEDM doweled oil pump gear for strength\u003c\/li\u003e\n\u003cli\u003eCamshaft features woodruff key for reliability\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eConfidence Starts With The Right Foundation Underneath\u003c\/h4\u003e\n\u003cp\u003eIf your 2001–2004 TopKick is down for the count, the DFC Diesel Street Series Long Block is the kind of replacement that does more than just get you back on the road, it sets you up for the long haul. Built specifically for work-ready applications and daily-driven diesels, this remanufactured 6.6L LB7 engine delivers premium reliability backed by a 5-year, 160,000 km warranty. That means you’re not just buying a motor, you’re investing in peace of mind. Every component inside is brand new, from pistons and rings to gaskets and bearings, so you’re not dealing with leftover wear from an old core. You’ll also get ARP or OptiTorque head studs for increased clamping force, which helps prevent common issues like blown head gaskets under load. It includes a top-end gasket kit to finish off the install, plus the valvetrain comes pre-set to factory specs to simplify the job. Whether your truck’s running tools to a job site or hauling equipment across town, this long block is ready for the demands of hard, everyday use.\u003c\/p\u003e\n\u003ch4\u003eBuilt With Precision For Heavy Duty Performance\u003c\/h4\u003e\n\u003cp\u003eThe DFC SS660104LB7TKSOALB long block is engineered for the demands of medium-duty trucks like the 2001–2004 GMC TopKick running the 6.6L Duramax LB7 platform. This remanufactured engine is machined using advanced Rottler equipment to ensure consistent, tight tolerances throughout every surface and component. The block is bored to accept next oversized pistons, paired with Total Seal gapless rings that deliver tighter combustion and lower oil consumption. Each set of cylinder heads is resurfaced, magnafluxed, and equipped with all new valves, guides, and stem seals for factory-spec airflow and durability. A woodruff-keyed camshaft adds rotational security, while DFC’s EDM doweled oil pump gear reinforces oil system stability. The long block includes a complete short block, reman heads, and a full top-end gasket kit for easy final assembly. All rockers and pushrods are pre-set to factory specs, reducing installation time and the risk of error during setup. This engine is a perfect match for drivers who need dependable performance and consistent output under load.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e Fits: \u003c\/strong\u003e 2001, 2002, 2003, 2004 GM\/Chevrolet 2500HD\/3500HD 6.6L Duramax LB7\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNotes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDesigned for 2001–2004 GMC TopKick with 6.6L LB7 Duramax\u003c\/li\u003e\n\u003cli\u003eIntended for daily driving, light towing, and work use\u003c\/li\u003e\n\u003cli\u003eStreet Series engines include upgrades to known LB7 failure points\u003c\/li\u003e\n\u003cli\u003eRemanufactured using brand new OEM or equivalent components\u003c\/li\u003e\n\u003cli\u003eAll cylinder heads are resurfaced, magnafluxed, and rebuilt\u003c\/li\u003e\n\u003cli\u003eIncludes top-end gasket kit to complete installation\u003c\/li\u003e\n\u003cli\u003eValvetrain components pre-set to factory specifications\u003c\/li\u003e\n\u003cli\u003eARP or OptiTorque head studs included depending on availability\u003c\/li\u003e\n\u003cli\u003eBlock is machined to accept next oversized pistons\u003c\/li\u003e\n\u003cli\u003eBuilt using advanced Rottler machining for consistent tolerances\u003c\/li\u003e\n\u003cli\u003eCovered by a 5-year or 160,000 km limited warranty\u003c\/li\u003e\n\u003cli\u003eProfessional installation recommended for proper setup and break-in\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-start=\"884\" data-end=\"931\"\u003eStreet Series vs Tow\/Haul vs Tow\/Haul HD\u003c\/h3\u003e\n\u003cul data-start=\"933\" data-end=\"1398\"\u003e\n\u003cli data-start=\"933\" data-end=\"1099\"\u003e\n\u003cp data-start=\"935\" data-end=\"1099\"\u003e\u003cstrong\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\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1100\" data-end=\"1240\"\u003e\n\u003cp data-start=\"1102\" data-end=\"1240\"\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\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1241\" data-end=\"1398\"\u003e\n\u003cp data-start=\"1243\" data-end=\"1398\"\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-start=\"1405\" data-end=\"1445\"\u003eStandard\/Auto vs Standard vs Auto\u003c\/h3\u003e\n\u003cul data-start=\"1447\" data-end=\"1706\"\u003e\n\u003cli data-start=\"1447\" data-end=\"1557\"\u003e\n\u003cp data-start=\"1449\" data-end=\"1557\"\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-start=\"1558\" data-end=\"1636\"\u003e\n\u003cp data-start=\"1560\" data-end=\"1636\"\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-start=\"1637\" data-end=\"1706\"\u003e\n\u003cp data-start=\"1639\" data-end=\"1706\"\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":68060705587473,"sku":"DDU-SS660104LB7TKSOALB","price":13460.38,"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_846ba560-7d3e-4ca9-b5ee-7e81ba7fd987.jpg?v=1794721798","url":"https:\/\/gautoparts.com\/products\/dfc-diesel-ss660104lb7tksoalb-street-series-speed-of-air-long-block-standard-auto-2001-2004-gm-chevrolet-2500hd-3500hd-6-6l-duramax-lb7-topkick","provider":"Guaranteed Auto Parts","version":"1.0","type":"link"}