{"product_id":"blueprint-engines-bare-block-ls-siam-9-240-x-4-000-cast-mc-4-hd-blt","title":"BluePrint Engines Bare Block - 468 c.i. - LS, SIAM, 9.240 x 4.000, CAST MC, 4 HD BLT","description":"\u003cdiv class=\"product-custom-info\"\u003e\n\u003ch4 class=\"pro-title-custom\"\u003eOverview:\u003c\/h4\u003e\n\u003cp class=\"pro-title-custom\"\u003eWhen your LS build demands serious displacement, you need a block that’s engineered to go the distance—and this LS-compatible foundation is built to stretch all the way to an impressive 468 cubic inches. With reinforced architecture, thick cylinder walls, and precision-machined surfaces, it delivers the rigidity and reliability needed for high-horsepower, high-rpm combinations. Whether you’re assembling a torque-rich street monster, a boosted track bruiser, or a no-compromise stroker setup, this block gives you the headroom and confidence to push your LS platform far beyond stock limits. Big inches, big power, and rock-solid dependability start right here.\u003c\/p\u003e\n\u003ch4 class=\"pro-title-custom\"\u003eCylinder Bore (Rough):\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e3.989\" to 3.991\"\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 class=\"pro-title-custom\"\u003eCylinder Bore (Max):\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e4.185\"\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 class=\"pro-title-custom\"\u003eCam Bearings:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eDura-Bond CH-25\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 class=\"pro-title-custom\"\u003eCam Bearing Bore ID:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e#1 \u0026amp; 5: 2.3482±.0005\", #2 \u0026amp; 4: 2.3285±.0005\", # 3: 2.3088±.0005\" w\/ stock available to bore up to 2.362\" (60mm)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 class=\"pro-title-custom\"\u003eCamshaft Position:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eStock OEM position - 4.885\" to Crank\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 class=\"pro-title-custom\"\u003eCam Drive \/ Timing Set:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eAccepts OEM style\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 class=\"pro-title-custom\"\u003eCam Retaining Plate:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eBluePrint Engines P\/N:18111370\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 class=\"pro-title-custom\"\u003eCubic Inch (Max):\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e468 in3\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 class=\"pro-title-custom\"\u003eCylinder Wall Thickness:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e.210\" @ 4.185\" Bore\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 class=\"pro-title-custom\"\u003eCylinder Skirt Length:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e5.750\"\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 class=\"pro-title-custom\"\u003eDeck Height:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e9.240\" +.005\/-.000\"\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 class=\"pro-title-custom\"\u003eDeck Thickness:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e.600\"\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 class=\"pro-title-custom\"\u003eFreeze \/ Core Plugs:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e1 5\/8\" dia, BluePrint Engines p\/n: 10110016 (Qty 8)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 class=\"pro-title-custom\"\u003eHead Bolt \/ Stud:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e4 Per Cylinder\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 class=\"pro-title-custom\"\u003eHead Bolt \/ Stud Threads:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eM11 x 2.0 2.36\" Deep (+M8 uppers)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 class=\"pro-title-custom\"\u003eLifter Bores:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e.8437 ±.0005\"\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 class=\"pro-title-custom\"\u003eLifter Retainer (If not using tie car lifters):\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eBPE and LSX\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 class=\"pro-title-custom\"\u003eMain Bearing Bore (Line Honed):\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e2.7509 \/ 2.7514\"\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 class=\"pro-title-custom\"\u003eMain Bearing Caps:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eBillet Steel, OEM Style, 6 Bolts Per Cap\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 class=\"pro-title-custom\"\u003eMain Cap Bolts:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eInner: M10 x 102mm, Outer: M10 x 84mm (stud), Skirt: M8 x 24mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 class=\"pro-title-custom\"\u003eMain Fastener Tensile Strength:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e180,000 to 210,000 PSI\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 class=\"pro-title-custom\"\u003eP1 Main Stud Kit P\/N:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eTBD\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 class=\"pro-title-custom\"\u003eARP Main Stud Kit P\/N:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eTBD\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 class=\"pro-title-custom\"\u003eMaterial (Block):\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eEN-GJL-250 Iron\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 class=\"pro-title-custom\"\u003eOil System:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003ePriority Main Oiling System w\/ Center Crossover\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 class=\"pro-title-custom\"\u003eOil Pump:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eOEM\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 class=\"pro-title-custom\"\u003eOil Filter:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eOEM (in Oil Pan)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 class=\"pro-title-custom\"\u003eOil Pan:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eOEM\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eOil Gallery Plug \/ Barbell \/ Dogbone (rear):\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eOEM\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003ePiston Oilers \/ Squirters:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eNo\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 class=\"pro-title-custom\"\u003eRear Main Seal:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eAccepts OEM Style Rear Cover\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 class=\"pro-title-custom\"\u003eStarter:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eOEM, Passenger Side Only\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 class=\"pro-title-custom\"\u003eStroke (Max):\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e4.250\"\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 class=\"pro-title-custom\"\u003eTiming Cover:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eOEM\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eValley Cover:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eOEM\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eAFM\/DOD Compatible:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eNo\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 class=\"pro-title-custom\"\u003eApprox. Weight with Main Caps:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e220-240lbs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product-custom-info\"\u003e\n\u003cp style=\"width: 50%; border: 1px; border-style: solid; border-color: #00469B; padding: .5em; text-align: left; line-height: 17px;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/2160\/9839\/files\/Yellow_Exclamation_25px.png?2265725208434072383\" alt=\"Yellow Exclamation Triangle\"\u003e\u003csmall\u003e\u003cstrong\u003e WARNING:\u003c\/strong\u003e Cancer and Reproductive Harm- \u003cbr\u003e\u003ca href=\"https:\/\/www.P65Warnings.ca.gov\" rel=\"noopener noreferrer\" target=\"_blank\"\u003ewww.P65Warnings.ca.gov\u003c\/a\u003e\u003c\/small\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Blueprint Engines","offers":[{"title":"Default Title","offer_id":50468196974878,"sku":"BPP12110356","price":5681.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0679\/7171\/1262\/files\/BPP12110356_1.jpg?v=1767160948","url":"https:\/\/platinumhpsolutions.myshopify.com\/products\/blueprint-engines-bare-block-ls-siam-9-240-x-4-000-cast-mc-4-hd-blt","provider":"Platinum High Performance Solutions, LLC.","version":"1.0","type":"link"}