{"id":10341333106913,"title":"Dart 31867212 LS NEXT Pro Iron Engine Block Gen III LS","handle":"dart-31867212-ls-next-shp-pro-iron-engine-block-4-125-bore-9-240-deck-gen-iii-ls","description":"\u003cp class=\"MsoNormal\" style=\"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; line-height: normal;\"\u003e\u003cspan style=\"font-size: 12pt; font-family: 'Times New Roman', serif; color: #000000;\"\u003eThis Dart 31867212 LS NEXT SHP Pro Iron Gen III LS Engine Block comes designed for serious street, strip, circle track, off-road as well as marine applications. It delivers the strength and reliability needed for high horsepower applications!\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; line-height: normal;\"\u003e\u003cspan style=\"font-size: 12pt; font-family: 'Times New Roman', serif; color: #000000;\"\u003eThis Dart block features 220 BHN cast iron construction and steel 4-bolt main caps with upgraded ARP main studs. Priority main oiling, siamese cylinder bores, as well as thick decks ensure head gasket sealing under demanding cylinder pressure. It also comes designed with 6-bolt per cylinder head capability, a factory oil filter provision, and clearance for center-counterweighted crankshafts.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; line-height: normal;\"\u003e\u003cspan style=\"font-size: 12pt; font-family: 'Times New Roman', serif; color: #000000;\"\u003eWith a 4.125\" bore and 9.240\" deck height, the Dart 31867212 is an excellent starting point for big-cube LS stroker combinations, boosted builds, nitrous engines, as well as high-compression naturally aspirated performance engines.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 style=\"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; line-height: normal;\" class=\"MsoNormal\"\u003e\u003cspan style=\"color: #000000;\"\u003e\u003cb\u003e\u003cu\u003e\u003cspan style=\"font-size: 12pt; font-family: 'Times New Roman', serif;\"\u003eDart 31867212 LS NEXT SHP Pro Iron Engine Block Specs:\u003c\/span\u003e\u003c\/u\u003e\u003c\/b\u003e\u003cspan style=\"font-size: 13.5pt; font-family: 'Segoe UI', sans-serif;\"\u003e\u003c\/span\u003e \u003c\/span\u003e\u003c\/h3\u003e\n\u003cul type=\"disc\"\u003e\n\u003cli style=\"color: black; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; line-height: normal; mso-list: l0 level1 lfo1; tab-stops: list .5in;\" class=\"MsoNormal\"\u003e\u003cspan style=\"font-size: 12pt; font-family: 'Times New Roman', serif; color: #000000;\"\u003eEngine Family: Chevy \/ GM LS Gen III\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"color: black; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; line-height: normal; mso-list: l0 level1 lfo1; tab-stops: list .5in;\" class=\"MsoNormal\"\u003e\u003cspan style=\"font-size: 12pt; font-family: 'Times New Roman', serif; color: #000000;\"\u003eBore Size: 4.125 in.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"color: black; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; line-height: normal; mso-list: l0 level1 lfo1; tab-stops: list .5in;\" class=\"MsoNormal\"\u003e\u003cspan style=\"font-size: 12pt; font-family: 'Times New Roman', serif; color: #000000;\"\u003eDeck Height: 9.240 in.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"color: black; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; line-height: normal; mso-list: l0 level1 lfo1; tab-stops: list .5in;\" class=\"MsoNormal\"\u003e\u003cspan style=\"font-size: 12pt; font-family: 'Times New Roman', serif; color: #000000;\"\u003eMaterial: 220 BHN Cast Iron\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"color: black; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; line-height: normal; mso-list: l0 level1 lfo1; tab-stops: list .5in;\" class=\"MsoNormal\"\u003e\u003cspan style=\"font-size: 12pt; font-family: 'Times New Roman', serif; color: #000000;\"\u003eMain Cap Type: Steel\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"color: black; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; line-height: normal; mso-list: l0 level1 lfo1; tab-stops: list .5in;\" class=\"MsoNormal\"\u003e\u003cspan style=\"font-size: 12pt; font-family: 'Times New Roman', serif; color: #000000;\"\u003eMain Bearing Type: Chevrolet LS\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"color: black; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; line-height: normal; mso-list: l0 level1 lfo1; tab-stops: list .5in;\" class=\"MsoNormal\"\u003e\u003cspan style=\"font-size: 12pt; font-family: 'Times New Roman', serif; color: #000000;\"\u003eCamshaft Location: Standard\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"color: black; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; line-height: normal; mso-list: l0 level1 lfo1; tab-stops: list .5in;\" class=\"MsoNormal\"\u003e\u003cspan style=\"font-size: 12pt; font-family: 'Times New Roman', serif; color: #000000;\"\u003eLifter Bore: 0.824 in.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"color: black; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; line-height: normal; mso-list: l0 level1 lfo1; tab-stops: list .5in;\" class=\"MsoNormal\"\u003e\u003cspan style=\"font-size: 12pt; font-family: 'Times New Roman', serif; color: #000000;\"\u003eRear Main Seal Type: Stock\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"color: black; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; line-height: normal; mso-list: l0 level1 lfo1; tab-stops: list .5in;\" class=\"MsoNormal\"\u003e\u003cspan style=\"font-size: 12pt; font-family: 'Times New Roman', serif; color: #000000;\"\u003eBlock Design: Full Skirt\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"color: black; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; line-height: normal; mso-list: l0 level1 lfo1; tab-stops: list .5in;\" class=\"MsoNormal\"\u003e\u003cspan style=\"font-size: 12pt; font-family: 'Times New Roman', serif; color: #000000;\"\u003eIncludes Dart parts kit 32000018\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"color: black; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; line-height: normal; mso-list: l0 level1 lfo1; tab-stops: list .5in;\" class=\"MsoNormal\"\u003e\u003cspan style=\"font-size: 12pt; font-family: 'Times New Roman', serif; color: #000000;\"\u003eSold individually\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"color: black; line-height: normal;\"\u003e\u003cspan style=\"font-size: 12pt; font-family: 'Times New Roman', serif; color: #000000;\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eIMPORTANT NOTE:\u003c\/strong\u003e\u003c\/span\u003e \u003cspan style=\"color: #ff2a00;\"\u003e\u003cstrong\u003eThis item is shipped on a pallet, via Freight Truck Only - $300.00 Extra.\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; line-height: normal;\" class=\"MsoNormal\"\u003e\u003cspan style=\"color: #000000;\"\u003e\u003cspan style=\"font-size: 12pt; font-family: 'Times New Roman', serif;\"\u003eAll development, machining and assembly are done at Dart’s own facilities in order to maintain the highest standards of quality. State-of-the-art CNC machining centers, a dynamometer and the proprietary “Speed Flow” technology\/wet flow bench are among the assets that contribute to “the Dart advantage”.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e","published_at":"2026-10-05T15:47:28-05:00","created_at":"2026-10-05T15:47:27-05:00","vendor":"DART","type":"Engines, Bare Blocks","tags":[],"price":469999,"price_min":469999,"price_max":469999,"available":true,"price_varies":false,"compare_at_price":null,"compare_at_price_min":0,"compare_at_price_max":0,"compare_at_price_varies":false,"variants":[{"id":50749245587681,"title":"Default Title","option1":"Default Title","option2":null,"option3":null,"sku":"DRT31867212","requires_shipping":true,"taxable":true,"featured_image":null,"available":true,"name":"Dart 31867212 LS NEXT Pro Iron Engine Block Gen III LS","public_title":null,"options":["Default Title"],"price":469999,"weight":0,"compare_at_price":null,"inventory_management":"shopify","barcode":"807051044072","requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}}],"images":["\/\/www.winnerscircle.com\/cdn\/shop\/files\/31867212.jpg?v=1791297613","\/\/www.winnerscircle.com\/cdn\/shop\/files\/31867212_2.jpg?v=1791297635","\/\/www.winnerscircle.com\/cdn\/shop\/files\/31867212_3.webp?v=1791297635","\/\/www.winnerscircle.com\/cdn\/shop\/files\/31867212_4.jpg?v=1791297635","\/\/www.winnerscircle.com\/cdn\/shop\/files\/31867212_5.jpg?v=1791297636"],"featured_image":"\/\/www.winnerscircle.com\/cdn\/shop\/files\/31867212.jpg?v=1791297613","options":["Title"],"media":[{"alt":"Dart 31867212 LS Next Pro Iron Engine Block, Gen III LS, 4.125 in. Bore, 9.240 in. Deck, 4-Bolt Main Caps with ARP main studs, sold individually","id":46292641349857,"position":1,"preview_image":{"aspect_ratio":1.0,"height":3000,"width":3000,"src":"\/\/www.winnerscircle.com\/cdn\/shop\/files\/31867212.jpg?v=1791297613"},"aspect_ratio":1.0,"height":3000,"media_type":"image","src":"\/\/www.winnerscircle.com\/cdn\/shop\/files\/31867212.jpg?v=1791297613","width":3000},{"alt":"Dart 31867212 LS Next Pro Iron Engine Block, Gen III LS, 4.125 in. Bore, 9.240 in. Deck, 4-Bolt Main Caps with ARP main studs, sold individually","id":46292644069601,"position":2,"preview_image":{"aspect_ratio":1.0,"height":3000,"width":3000,"src":"\/\/www.winnerscircle.com\/cdn\/shop\/files\/31867212_2.jpg?v=1791297635"},"aspect_ratio":1.0,"height":3000,"media_type":"image","src":"\/\/www.winnerscircle.com\/cdn\/shop\/files\/31867212_2.jpg?v=1791297635","width":3000},{"alt":"Dart 31867212 LS Next Pro Iron Engine Block, Gen III LS, 4.125 in. Bore, 9.240 in. Deck, 4-Bolt Main Caps with ARP main studs, sold individually","id":46292644036833,"position":3,"preview_image":{"aspect_ratio":1.0,"height":3000,"width":3000,"src":"\/\/www.winnerscircle.com\/cdn\/shop\/files\/31867212_3.webp?v=1791297635"},"aspect_ratio":1.0,"height":3000,"media_type":"image","src":"\/\/www.winnerscircle.com\/cdn\/shop\/files\/31867212_3.webp?v=1791297635","width":3000},{"alt":"Dart 31867212 LS Next Pro Iron Engine Block, Gen III LS, 4.125 in. Bore, 9.240 in. Deck, 4-Bolt Main Caps with ARP main studs, sold individually","id":46292644135137,"position":4,"preview_image":{"aspect_ratio":1.0,"height":3000,"width":3000,"src":"\/\/www.winnerscircle.com\/cdn\/shop\/files\/31867212_4.jpg?v=1791297635"},"aspect_ratio":1.0,"height":3000,"media_type":"image","src":"\/\/www.winnerscircle.com\/cdn\/shop\/files\/31867212_4.jpg?v=1791297635","width":3000},{"alt":"Dart 31867212 LS Next Pro Iron Engine Block, Gen III LS, 4.125 in. Bore, 9.240 in. Deck, 4-Bolt Main Caps with ARP main studs, sold individually","id":46292644102369,"position":5,"preview_image":{"aspect_ratio":1.0,"height":3000,"width":3000,"src":"\/\/www.winnerscircle.com\/cdn\/shop\/files\/31867212_5.jpg?v=1791297636"},"aspect_ratio":1.0,"height":3000,"media_type":"image","src":"\/\/www.winnerscircle.com\/cdn\/shop\/files\/31867212_5.jpg?v=1791297636","width":3000}],"requires_selling_plan":false,"selling_plan_groups":[],"content":"\u003cp class=\"MsoNormal\" style=\"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; line-height: normal;\"\u003e\u003cspan style=\"font-size: 12pt; font-family: 'Times New Roman', serif; color: #000000;\"\u003eThis Dart 31867212 LS NEXT SHP Pro Iron Gen III LS Engine Block comes designed for serious street, strip, circle track, off-road as well as marine applications. It delivers the strength and reliability needed for high horsepower applications!\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; line-height: normal;\"\u003e\u003cspan style=\"font-size: 12pt; font-family: 'Times New Roman', serif; color: #000000;\"\u003eThis Dart block features 220 BHN cast iron construction and steel 4-bolt main caps with upgraded ARP main studs. Priority main oiling, siamese cylinder bores, as well as thick decks ensure head gasket sealing under demanding cylinder pressure. It also comes designed with 6-bolt per cylinder head capability, a factory oil filter provision, and clearance for center-counterweighted crankshafts.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; line-height: normal;\"\u003e\u003cspan style=\"font-size: 12pt; font-family: 'Times New Roman', serif; color: #000000;\"\u003eWith a 4.125\" bore and 9.240\" deck height, the Dart 31867212 is an excellent starting point for big-cube LS stroker combinations, boosted builds, nitrous engines, as well as high-compression naturally aspirated performance engines.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 style=\"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; line-height: normal;\" class=\"MsoNormal\"\u003e\u003cspan style=\"color: #000000;\"\u003e\u003cb\u003e\u003cu\u003e\u003cspan style=\"font-size: 12pt; font-family: 'Times New Roman', serif;\"\u003eDart 31867212 LS NEXT SHP Pro Iron Engine Block Specs:\u003c\/span\u003e\u003c\/u\u003e\u003c\/b\u003e\u003cspan style=\"font-size: 13.5pt; font-family: 'Segoe UI', sans-serif;\"\u003e\u003c\/span\u003e \u003c\/span\u003e\u003c\/h3\u003e\n\u003cul type=\"disc\"\u003e\n\u003cli style=\"color: black; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; line-height: normal; mso-list: l0 level1 lfo1; tab-stops: list .5in;\" class=\"MsoNormal\"\u003e\u003cspan style=\"font-size: 12pt; font-family: 'Times New Roman', serif; color: #000000;\"\u003eEngine Family: Chevy \/ GM LS Gen III\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"color: black; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; line-height: normal; mso-list: l0 level1 lfo1; tab-stops: list .5in;\" class=\"MsoNormal\"\u003e\u003cspan style=\"font-size: 12pt; font-family: 'Times New Roman', serif; color: #000000;\"\u003eBore Size: 4.125 in.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"color: black; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; line-height: normal; mso-list: l0 level1 lfo1; tab-stops: list .5in;\" class=\"MsoNormal\"\u003e\u003cspan style=\"font-size: 12pt; font-family: 'Times New Roman', serif; color: #000000;\"\u003eDeck Height: 9.240 in.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"color: black; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; line-height: normal; mso-list: l0 level1 lfo1; tab-stops: list .5in;\" class=\"MsoNormal\"\u003e\u003cspan style=\"font-size: 12pt; font-family: 'Times New Roman', serif; color: #000000;\"\u003eMaterial: 220 BHN Cast Iron\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"color: black; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; line-height: normal; mso-list: l0 level1 lfo1; tab-stops: list .5in;\" class=\"MsoNormal\"\u003e\u003cspan style=\"font-size: 12pt; font-family: 'Times New Roman', serif; color: #000000;\"\u003eMain Cap Type: Steel\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"color: black; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; line-height: normal; mso-list: l0 level1 lfo1; tab-stops: list .5in;\" class=\"MsoNormal\"\u003e\u003cspan style=\"font-size: 12pt; font-family: 'Times New Roman', serif; color: #000000;\"\u003eMain Bearing Type: Chevrolet LS\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"color: black; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; line-height: normal; mso-list: l0 level1 lfo1; tab-stops: list .5in;\" class=\"MsoNormal\"\u003e\u003cspan style=\"font-size: 12pt; font-family: 'Times New Roman', serif; color: #000000;\"\u003eCamshaft Location: Standard\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"color: black; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; line-height: normal; mso-list: l0 level1 lfo1; tab-stops: list .5in;\" class=\"MsoNormal\"\u003e\u003cspan style=\"font-size: 12pt; font-family: 'Times New Roman', serif; color: #000000;\"\u003eLifter Bore: 0.824 in.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"color: black; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; line-height: normal; mso-list: l0 level1 lfo1; tab-stops: list .5in;\" class=\"MsoNormal\"\u003e\u003cspan style=\"font-size: 12pt; font-family: 'Times New Roman', serif; color: #000000;\"\u003eRear Main Seal Type: Stock\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"color: black; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; line-height: normal; mso-list: l0 level1 lfo1; tab-stops: list .5in;\" class=\"MsoNormal\"\u003e\u003cspan style=\"font-size: 12pt; font-family: 'Times New Roman', serif; color: #000000;\"\u003eBlock Design: Full Skirt\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"color: black; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; line-height: normal; mso-list: l0 level1 lfo1; tab-stops: list .5in;\" class=\"MsoNormal\"\u003e\u003cspan style=\"font-size: 12pt; font-family: 'Times New Roman', serif; color: #000000;\"\u003eIncludes Dart parts kit 32000018\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"color: black; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; line-height: normal; mso-list: l0 level1 lfo1; tab-stops: list .5in;\" class=\"MsoNormal\"\u003e\u003cspan style=\"font-size: 12pt; font-family: 'Times New Roman', serif; color: #000000;\"\u003eSold individually\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"color: black; line-height: normal;\"\u003e\u003cspan style=\"font-size: 12pt; font-family: 'Times New Roman', serif; color: #000000;\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eIMPORTANT NOTE:\u003c\/strong\u003e\u003c\/span\u003e \u003cspan style=\"color: #ff2a00;\"\u003e\u003cstrong\u003eThis item is shipped on a pallet, via Freight Truck Only - $300.00 Extra.\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; line-height: normal;\" class=\"MsoNormal\"\u003e\u003cspan style=\"color: #000000;\"\u003e\u003cspan style=\"font-size: 12pt; font-family: 'Times New Roman', serif;\"\u003eAll development, machining and assembly are done at Dart’s own facilities in order to maintain the highest standards of quality. State-of-the-art CNC machining centers, a dynamometer and the proprietary “Speed Flow” technology\/wet flow bench are among the assets that contribute to “the Dart advantage”.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e"}