{"product_id":"fleece-performance-gm-ltr-freedom-series-standard-deck-solid-aluminum-block","title":"Fleece Performance GM LTR Freedom Series Standard Deck Solid Aluminum Block","description":"\u003cdiv\u003e\n\u003cstrong\u003eSKU:\u003c\/strong\u003e \u003cspan itemprop=\"sku\"\u003eFPE-LTR-FMJ-SD10X\u003c\/span\u003e   |   \u003cstrong\u003eUPC:\u003c\/strong\u003e 732777409808\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003ch4\u003e\u003cstrong\u003eFleece Performance Freedom Series Solid Aluminum Full-Machined Billet Block - GM LTR Standard Deck (10X)\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eThe Fleece Performance Freedom Series solid aluminum block provides the foundation for extreme-power Duramax builds that exceed the limits of factory cast-iron blocks. Precision CNC-machined from a single 1,000+ lb aircraft-grade 6061-T6 aluminum forging, this standard-deck block delivers unmatched strength, reduced weight, and superior heat dissipation while supporting 3,000+ horsepower applications with proper head retention and girdle systems.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSolid Billet 6061-T6 Aluminum Construction:\u003c\/strong\u003e No sleeves – fully machined from one solid forging for maximum rigidity and consistency.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard Deck Height:\u003c\/strong\u003e 9.760\" (same as factory LTR block) – direct replacement for 2020+ L5P and LTR engines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExtra-Thick Decks \u0026amp; Cylinder Walls:\u003c\/strong\u003e 0.750\" minimum deck thickness and 0.500\"+ cylinder wall thickness for extreme cylinder pressure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBore Capability:\u003c\/strong\u003e Ships finish-honed at 4.125\" (supports up to 4.250\" bore with custom machining).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReinforced Main Webbing \u0026amp; ARP Main Stud Ready:\u003c\/strong\u003e Accepts ARP 625+ or custom main studs without modification.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImproved Oil \u0026amp; Enlarged Oil Galleries:\u003c\/strong\u003e Enhanced lubrication paths for high-volume oil systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight Savings:\u003c\/strong\u003e Approximately 95-100 lbs total block weight (vs. 215+ lbs for factory iron block).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMade in the USA:\u003c\/strong\u003e 100% CNC-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-LTR-FMJ-SD10X (Standard Deck 10X version).\u003c\/li\u003e\n\u003cli\u003eBlock is delivered finish-honed, decked, line-honed, and bored\/honed to 4.125\" with torque plate.\u003c\/li\u003e\n\u003cli\u003eCompatible with all factory LTR\/L5P oil pans, timing covers, and accessories.\u003c\/li\u003e\n\u003cli\u003eRequires billet main cap girdle (recommended Fleece or equivalent) and head stud\/fire-ring setup for extreme power levels.\u003c\/li\u003e\n\u003cli\u003eCamshaft bore enlarged to accept 65mm roller bearings.\u003c\/li\u003e\n\u003cli\u003eNo provision for factory piston oil squirters (blocked off for competition use).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eIntended for professional race engine builders only – requires full custom assembly.\u003c\/li\u003e\n\u003cli\u003eDeck surface finish: RA 15-20 for MLS or O-ring heads.\u003c\/li\u003e\n\u003cli\u003eAll threads are cut, not cast – compatible with standard Duramax fasteners.\u003c\/li\u003e\n\u003cli\u003eCore charge does not apply – this is a 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\u003e2020-2025\u003c\/td\u003e\n\u003ctd\u003eChevrolet\u003c\/td\u003e\n\u003ctd\u003eSilverado 2500\/3500\u003c\/td\u003e\n\u003ctd\u003eL5P \/ LTR 6.6L Duramax\u003c\/td\u003e\n\u003ctd\u003eStandard Deck\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2020-2025\u003c\/td\u003e\n\u003ctd\u003eGMC\u003c\/td\u003e\n\u003ctd\u003eSierra 2500\/3500\u003c\/td\u003e\n\u003ctd\u003eL5P \/ LTR 6.6L Duramax\u003c\/td\u003e\n\u003ctd\u003eStandard Deck\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\u003eIndustry leader in high-horsepower Duramax components with proven 3,000+ HP builds.\u003c\/li\u003e\n\u003cli\u003eEvery Freedom Series block is individually CNC-machined and inspected in-house.\u003c\/li\u003e\n\u003cli\u003eTrusted by top drag, sled pull, and diesel performance shops nationwide.\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 What bore size does it come with?\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eA:\u003c\/strong\u003e Ships finish-honed at 4.125\" (stock L5P bore). Can be machined larger by your engine builder.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e Does this block require a girdle?\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eA:\u003c\/strong\u003e Strongly recommended above 1,500 hp mandatory above 2,000 hp for reliability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ:\u003c\/strong\u003e Will factory L5P heads bolt on?\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eA:\u003c\/strong\u003e Yes, same bolt pattern and dowel locations as OEM LTR 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 180–200 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 lining.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAvailability:\u003c\/strong\u003e 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":43764657225807,"sku":"FPEFPE-LTR-FMJ-SD10X","price":6850.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1062\/7920\/files\/fleece-freedom-series-ltr-aluminum-block-front.png?v=1763479380","url":"https:\/\/www.blackopsautoworks.com\/products\/fleece-performance-gm-ltr-freedom-series-standard-deck-solid-aluminum-block","provider":"Black Ops Auto Works","version":"1.0","type":"link"}