Dart LS Next Engine Block Cast Iron 4.125 / 9.450
301-31837221
Product Q&A
View Now
Iron Blocks
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
- Siamesed cylinder bores with extra thick walls
- Cylinder barrels extended .375" at the bottom
- Extra thick decks ensure reliable head gasket seal
- Blind head bolt holes don’t go through to water jacket
- Scalloped water jackets increase flow around cylinders for better cooling
- Clearance for 4.100" stroke w/ steel rods
- Splayed outer bolts on middle main bearing caps
- LS or Gen I 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
Specifications:
can I build a 427 out of this block
Motor Vehicles
WARNING: Motor vehicles contain fuel, oils and fluids, battery posts, terminals and related accessories which contain lead and lead compounds and other chemicals known to the State of California to cause cancer, birth defects and other reproductive harm. These chemicals are found in vehicles, vehicle parts and accessories, both new and as replacements. When being serviced, these vehicles generate used oil, waste fluids, grease, fumes and particulates, all known to the State of California to cause cancer, birth defects, and reproductive harm.
Tools:
WARNING: Some dust created by power sanding, sawing, grinding, drilling, and other construction activities contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Some examples of these chemicals are: lead from lead-based paints, crystalline silica from bricks and cement and other masonry products, and arsenic and chromium from chemically treated lumber. Your risk from exposure to these chemicals varies, depending on how often you do this type of work. To reduce your exposure, work in a well-ventilated area and with approved safety equipment, such as dust masks that are specially designed to filter out microscopic particles.
Electrical Cords
WARNING: The wires of these products contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling.