{"product_id":"spool-performance-darton-sleeved-m178-engine-block","title":"Spool Performance Darton Sleeved M178 Engine Block","description":"\u003ch2 data-start=\"144\" data-end=\"187\"\u003eMercedes-AMG M178 Darton Sleeved Block\u003c\/h2\u003e\n\u003cp data-start=\"246\" data-end=\"619\"\u003eThe factory Mercedes-AMG M178 aluminum block was never designed for the cylinder pressures seen in today’s high-boost, high-power applications. When pushing the limits of the platform, proper cylinder support becomes non-negotiable. Our \u003cstrong data-start=\"483\" data-end=\"525\"\u003eM178 Darton Sleeving Machining Service\u003c\/strong\u003e transforms the stock block into a foundation capable of handling extreme horsepower reliably.\u003c\/p\u003e\n\u003cp data-start=\"621\" data-end=\"853\"\u003eThis service involves precision machining and installation of \u003cstrong data-start=\"683\" data-end=\"714\"\u003eDarton ductile iron sleeves\u003c\/strong\u003e, providing vastly improved cylinder strength, distortion control, and long-term durability under high boost and elevated combustion loads.\u003c\/p\u003e\n\u003cp data-start=\"855\" data-end=\"1065\"\u003eEach block is CNC-machined, sleeved, and \u003cstrong data-start=\"896\" data-end=\"931\"\u003efinish-honed to within ±0.0001\"\u003c\/strong\u003e, ensuring exceptional bore geometry, ring seal, and piston stability—critical for both high RPM and high cylinder pressure operation.\u003c\/p\u003e\n\u003ch3 data-start=\"1067\" data-end=\"1086\"\u003eWhat’s Included\u003c\/h3\u003e\n\u003cul data-start=\"1087\" data-end=\"1301\"\u003e\n\u003cli data-start=\"1087\" data-end=\"1137\"\u003e\n\u003cp data-start=\"1089\" data-end=\"1137\"\u003ePrecision machining of the M178 aluminum block\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1138\" data-end=\"1185\"\u003e\n\u003cp data-start=\"1140\" data-end=\"1185\"\u003eProfessional installation of Darton sleeves\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1186\" data-end=\"1241\"\u003e\n\u003cp data-start=\"1188\" data-end=\"1241\"\u003eFinal torque-plate honing to \u003cstrong data-start=\"1217\" data-end=\"1229\"\u003e±0.0001\"\u003c\/strong\u003e tolerance\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1242\" data-end=\"1301\"\u003e\n\u003cp data-start=\"1244\" data-end=\"1301\"\u003eReady for custom piston fitment and high-power assembly\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-start=\"1303\" data-end=\"1326\"\u003eWhy Darton Sleeves?\u003c\/h3\u003e\n\u003cul data-start=\"1327\" data-end=\"1509\"\u003e\n\u003cli data-start=\"1327\" data-end=\"1371\"\u003e\n\u003cp data-start=\"1329\" data-end=\"1371\"\u003eDramatically increased cylinder strength\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1372\" data-end=\"1414\"\u003e\n\u003cp data-start=\"1374\" data-end=\"1414\"\u003eImproved resistance to bore distortion\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1415\" data-end=\"1454\"\u003e\n\u003cp data-start=\"1417\" data-end=\"1454\"\u003eSuperior ring seal under high boost\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1455\" data-end=\"1509\"\u003e\n\u003cp data-start=\"1457\" data-end=\"1509\"\u003eEssential for big-power and race-level M178 builds\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-start=\"1511\" data-end=\"1530\"\u003eImportant Notes\u003c\/h3\u003e\n\u003cul data-start=\"1531\" data-end=\"1766\"\u003e\n\u003cli data-start=\"1531\" data-end=\"1601\"\u003e\n\u003cp data-start=\"1533\" data-end=\"1601\"\u003e\u003cstrong data-start=\"1533\" data-end=\"1569\"\u003eThis is a machining service only\u003c\/strong\u003e — no engine block is included\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1602\" data-end=\"1679\"\u003e\n\u003cp data-start=\"1604\" data-end=\"1679\"\u003eYou may supply your own M178 block \u003cstrong data-start=\"1639\" data-end=\"1645\"\u003eor\u003c\/strong\u003e we can assist with sourcing one\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1680\" data-end=\"1766\"\u003e\n\u003cp data-start=\"1682\" data-end=\"1766\"\u003ePistons, assembly, and short-block build are not included unless quoted separately\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1768\" data-end=\"1943\"\u003eIf you’re planning a serious M178 build and want a block that can handle the abuse, this is the starting point.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c!----\u003e","brand":"Spool Performance","offers":[{"title":"Default Title","offer_id":51595297128743,"sku":"SP-ENG-M178-DSB","price":6499.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0959\/3146\/6023\/files\/1_dd721a4b-c5c3-4ddd-a225-081be9392387.png?v=1783387410","url":"https:\/\/primestore.us\/products\/spool-performance-darton-sleeved-m178-engine-block","provider":"PrimeStore Premium Marketplace ","version":"1.0","type":"link"}