LS NEXT Chevy LS Gen III Iron Block – 4.000-4.125 In. Bore, 9.240-9.450 In. Deck

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Designed from a clean slate approach the LS Next Iron 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.

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.

FEATURES
• Priority main oiling system with two lifter crossovers and restrictor provisions.
• Siamesed cylinder bores with extra thick walls.
• Cylinder barrels extended .375” at the bottom.
• Extra thick decks ensure reliable head gasket seal.
• 7/16” Blind head bolt holes.
• Scalloped water jackets increase flow around cylinders for better cooling.
• Clearance for 4.100” stroke w/ steel rods.
• MUST BE clearanced for centre counterweighted crankshafts.
• Splayed outer bolts on middle main bearing caps.
• LS style motor mounts.
• Provisions for OE stock roller lifters and cam.
• Uses stock timing covers and stock rear cover.
• All OE bolt holes for starter, water pump, etc.
• Driver or passenger side starter mounts.
• Parts kit sold separately (PN: 32000016).

LS NEXT OIL PAN RAIL SPACERS - SOLD SEPERATELY
PART NO. DESCRIPTION
62230001 LS Next Oil Pan Rail Spacers w/ power
steering, AC & oil dipstick provision.

LS NEXT (RACE BLOCK) SPECS
Material: 220 BHN Cast Iron
Deck Height: 9.240” (stock)
up to 9.450”
Cylinder Bores: 4.000” up to
4.200” (max)
Main Bearings: Stock LS
Main Caps: Steel
4-bolt 1-5
Cam Location: Stock
Lifter Bores: Stock .842” dia.
Freeze Plugs: Press fi t
Rear Seal: Stock LS
Weight: 227 lbs.

31837111 LS Next Iron STD Steel STD 9.240” 4.000”
31837211 LS Next Iron STD Steel STD 9.240” 4.125”
31837121 LS Next Iron STD Steel STD 9.450” 4.000”
31837221 LS Next Iron STD Steel STD 9.450” 4.125”