Dart LS Next Aluminum Block - 4.000" Bore - Skirted

DART LS NEXT ALUMINUM BLOCK - 4.000" BORE - SKIRTED - 31947111
Designed from a clean slate approach, the LS Next Aluminum block has addressed the shortcomings of the LS platform and is the ideal candidate for hot rodders, drag racers, circle track competitors, off-roaders, and high performance marine enthusiasts. Features Dart priority main oiling system with provisions for stock oil filter mounting. By utilizing conventional style main caps and oil pans with LS rotating assemblies and related components, Dart has addressed the windage and oil control problems which result from the factory LS engine’s separated crankcase bays.
Skirted and non-skirted design options available; Priority main oiling system; Available in deck heights from 9.240in, 9.450in, 9.750in up to 9.800in; STD or raised .388in cam location; Cylinder barrel  extended .375in at the bottom; Extra thick decks ensure reliable head gasket seal; Blind head bolt holes available in 7/16in or 1/2in; Scalloped water jackets increase flow around cylinders for better cooling; Clearance for 4.100in stroke with steel rods; MUST BE clearanced for center counterweighted crankshafts; Splayed outer bolts on middle main bearing style motor mounts; Provisions for OE stock roller lifters and stock timing covers and stock rear cover; All OE bolt holes for starter, water pump, or passenger side starter mounts (Not available with skirted version); Parts kit included.