{"product_id":"fleece-performance-gm-lsr-standard-deck-wet-aluminum-engine-block","title":"Fleece Performance GM LSR Standard Deck Wet Aluminum Engine Block","description":"\u003cdiv\u003e\n\u003cstrong\u003eSKU:\u003c\/strong\u003e \u003cspan itemprop=\"sku\"\u003eFPE-LSR-SD10X\u003c\/span\u003e   |   \u003cstrong\u003eUPC:\u003c\/strong\u003e 732777409730\u003c\/div\u003e\n\u003cdiv\u003e\u003c\/div\u003e\n\u003ch4\u003e\u003cstrong\u003eFleece Performance Freedom Series Wet Aluminum Billet Block - GM LSR Standard Deck (10X) with Ductile Iron Sleeves\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eThe Fleece Performance Freedom Series wet-sleeve aluminum block for the 2024+ LSR Duramax delivers a repairable, high-horsepower capable platform that saves over 100 lbs versus the factory iron block while providing better heat transfer and cylinder sealing. CNC-machined from a single 6061-T6 aluminum forging and equipped with centrifugally cast ductile iron wet sleeves, this standard-deck block supports 2,500+ horsepower builds in street trucks, hot-street pullers, or competition engines where long-term serviceability and reliability remain priorities.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eWet Ductile Iron Sleeves:\u003c\/strong\u003e Replaceable high-strength liners handle extreme cylinder pressure and allow future rebuilding.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard Deck Height:\u003c\/strong\u003e 9.760\" direct replacement for 2024+ LSR 6.6L Duramax engines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThick Decks \u0026amp; Reinforced Mains:\u003c\/strong\u003e Minimum 0.750\" deck thickness and heavy main webbing reinforcement.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBore Size:\u003c\/strong\u003e Ships finish-honed at 4.125\" (supports up to 4.250\" overbore).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImproved Oiling:\u003c\/strong\u003e Enlarged galleries for high-volume pumps and roller cam bearings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCam Bore:\u003c\/strong\u003e Machined to 65mm for roller bearing cams.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e Approximately 110-115 lbs (100+ lbs lighter than OEM iron block).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMade in USA:\u003c\/strong\u003e Fully machined and inspected at Fleece Performance in Indiana.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eProduct Notes\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003ePart number: FPE-LSR-SD10X (wet-sleeve version for 2024+ LSR).\u003c\/li\u003e\n\u003cli\u003eBlock arrives torque-plate honed, align-honed, decked, and ready for assembly.\u003c\/li\u003e\n\u003cli\u003eFits all factory LSR oil pans, timing covers, valley plates, and accessories.\u003c\/li\u003e\n\u003cli\u003ePiston oil squirter provisions retained (can be blocked for race use).\u003c\/li\u003e\n\u003cli\u003eAccepts ARP main studs and standard Duramax fasteners.\u003c\/li\u003e\n\u003cli\u003eIdeal for street-driven high-horsepower trucks that may need future cylinder service.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eProfessional race engine builder assembly required.\u003c\/li\u003e\n\u003cli\u003eDeck surface RA 15-20 finish compatible with MLS or copper head gaskets.\u003c\/li\u003e\n\u003cli\u003eBillet main girdle recommended above 1,800 hp.\u003c\/li\u003e\n\u003cli\u003eNo core charge new billet block.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eThis Part Fits\u003c\/h4\u003e\n\u003ctable border=\"1\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eYear\u003c\/th\u003e\n\u003cth\u003eMake\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eEngine\u003c\/th\u003e\n\u003cth\u003eNotes\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e2024-2026\u003c\/td\u003e\n\u003ctd\u003eChevrolet\u003c\/td\u003e\n\u003ctd\u003eSilverado 2500\/3500\u003c\/td\u003e\n\u003ctd\u003eLSR 6.6L Duramax\u003c\/td\u003e\n\u003ctd\u003eStandard Deck Wet Sleeve\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2024-2026\u003c\/td\u003e\n\u003ctd\u003eGMC\u003c\/td\u003e\n\u003ctd\u003eSierra 2500\/3500\u003c\/td\u003e\n\u003ctd\u003eLSR 6.6L Duramax\u003c\/td\u003e\n\u003ctd\u003eStandard Deck Wet Sleeve\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch4\u003eWhy Choose Fleece Performance?\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eProven in 2,000–2,500+ HP street and pulling trucks nationwide.\u003c\/li\u003e\n\u003cli\u003eEvery Freedom Series block individually machined and inspected in-house.\u003c\/li\u003e\n\u003cli\u003eCombines aluminum weight\/heat benefits with ductile sleeve durability and repairability.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e How does the wet-sleeve block differ from the solid aluminum version?\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eA:\u003c\/strong\u003e Wet-sleeve uses replaceable ductile iron liners for easier future repair and slightly more weight, making it better for street and heavy-use applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e What bore size is it delivered at?\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eA:\u003c\/strong\u003e Finish-honed at 4.125\" ready for standard or stroker pistons.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e Do factory LSR heads bolt directly on?\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eA:\u003c\/strong\u003e Yes, identical bolt pattern, dowels, and coolant passages to the OEM LSR block.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eShipping \u0026amp; Handling\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMethod:\u003c\/strong\u003e Freight truck only (wood crated, fully insured).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Weight:\u003c\/strong\u003e Approximately 200–220 lbs (block + crate).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCrate Dimensions (approx):\u003c\/strong\u003e 42\" × 28\" × 28\" reinforced wood crate with foam.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAvailability:\u003c\/strong\u003e Typically ships same day or next if in stock otherwise these are Built to order – typical lead time 8–14 weeks.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Fleece Performance","offers":[{"title":"Default Title","offer_id":43764657160271,"sku":"FPEFPE-LSR-SD10X","price":6750.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1062\/7920\/files\/fleece-lsr-wet-sleeve-aluminum-block-front.png?v=1763480508","url":"https:\/\/www.blackopsautoworks.com\/products\/fleece-performance-gm-lsr-standard-deck-wet-aluminum-engine-block","provider":"Black Ops Auto Works","version":"1.0","type":"link"}