Dart 31182211 Little M Cast Iron Engine Block Small Block Chevy 9.025 Deck 4.125 Bore 400 Mains

The Dart Little M2 cast iron engine block is the affordable alternative for serious small-block Chevy racers, offering a true race-ready foundation that works with standard off-the-shelf components. This block features a 9.025-inch standard deck height, 4.125-inch cylinder bore, 400 main bearings, and billet steel 4-bolt main caps with splayed outer bolts for maximum strength.

Key Features:

• Cast from premium high-strength Class 32B iron and beefed up in all critical areas
• Siamese cylinder bores with extra thick walls (minimum .275" thick) resist cracking and improve ring seal
• Priority main oiling system feeds main bearings first for adequate lubrication at high RPM
• Front and rear external oil feed, crossover and restrictor provision simplify plumbing with external pumps
• Blind tapped head bolt holes prevent water leaks and extra thick decks ensure reliable head gasket seal
• Includes cam bearings, freeze plugs, steel main caps and fasteners with 2-piece rear seal design
• Uses standard small block parts including cam, timing chain, oil pump, oil pan, oil filter, motor mounts, mechanical fuel pump, and clutch linkage
• Maximum bore capacity of 4.185 inches, ships with 4.115-inch cylinder bore as machined

The Little M eliminates the time and expense of blueprinting a questionable junkyard block while providing the structural integrity needed for high-performance and racing applications. Features provisions for wet or dry sump oiling systems.