{"product_id":"smeding-performance-heavy-duty-6-bolt-ls-engine-block","title":"Smeding Hvy Dty LS Iron Block","description":"\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe new \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eSmeding Performance Heavy-Duty 6-Bolt LS Engine Block\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e is engineered for racers who demand a stronger, more capable foundation for today’s high-performance LS builds. Designed to withstand the extreme cylinder pressures and RPM levels common in modern race applications, this aftermarket block delivers the strength and oiling efficiency needed when a production block simply isn’t enough.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eCast from \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e220 BHN Class 35 gray cast iron\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, the block provides exceptional strength, rigidity, and durability. A set of \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003ebillet steel main caps\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e comes standard, utilizing a \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e4-bolt splayed main cap design \u003c\/span\u003e\u003c\/strong\u003ewith 7\/16-inch fasteners\u003cspan\u003e for increased bottom-end stability and clamping strength.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe cylinder heads are secured with an upgraded \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e6-bolt head bolt configuration\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, providing additional clamping force to help maintain head gasket integrity under extreme cylinder pressures. This makes the block an ideal foundation for high-output naturally aspirated, boosted, and other demanding race applications.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe oiling system has also been significantly upgraded with a \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003ethree-galley oiling design\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e. This configuration provides the crankshaft and connecting rods with a dedicated oil circuit, improving oil distribution and reducing the demands placed on the main oiling system. The result is a more efficient and robust lubrication system designed to support the extreme RPM levels found in today’s high-performance race engines.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eFor additional customization and strength, the Smeding Performance Heavy-Duty 6-Bolt block is available with \u003c\/span\u003e1\/2-inch head bolt machining\u003cspan\u003e and an \u003c\/span\u003eARP main stud upgrade.\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eWhen the goal is to build a serious LS engine capable of handling increased power, cylinder pressure, and RPM, the Smeding Performance Heavy-Duty 6-Bolt Cast Iron Engine Block provides the foundation to do it right.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSpecs:\u003cbr\u003e\u003c\/strong\u003eRough Bore Diameter - 4.120\" \u003cbr\u003eMaximum Bore Diameter - 4.185\"\u003cbr\u003eDeck Height - 9.240\"\u003cbr\u003eCylinder Length - 5.750\"\u003cbr\u003eEngine Block Material - 220 BHN Class 35 Gray Cast Iron\u003cbr\u003eMain Cap Material - Billet Steel\u003cbr\u003eMain Cap Fasteners - 7\/16\" 150k psi\u003cbr\u003eOiling System - Priority Main 3-Galley\u003cbr\u003eLifter Bore - 0.842\"\u003cbr\u003eThrust Plate Included\u003cbr\u003eBlock Plug Kit Included\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCompatible Parts:\u003cbr\u003e\u003c\/strong\u003eHead Stud Kit - ARP 234-4341\u003cbr\u003eMain Stud Kit - ARP 134-5901\u003cbr\u003eCam Bearings - Dura-Bond 32210101T\u003cbr\u003eMain Bearings - King MB5777XP\u003cbr\u003eRear Main Seal - GM 12639250\u003c\/p\u003e","brand":"Smeding Performance","offers":[{"title":"Default Title","offer_id":40149570027578,"sku":"SP41259240LS","price":2995.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0099\/5046\/1988\/files\/SP_LS-HD-Iron_01b_65957056-8012-4f20-8108-28cd8ded7aa8.jpg?v=1788372457","url":"https:\/\/smedingperformance.com\/products\/smeding-performance-heavy-duty-6-bolt-ls-engine-block","provider":"Smeding Performance","version":"1.0","type":"link"}