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For Sale: DART LS Next Iron Block - 2000 HP

4.000 & 4.125 bores - Steel Main Caps

Ad #182211991   Posted:2014-05-31 20:49:11

This ad expired 76 days ago.


The LS Next block is the first significant change in the bottom end architecture of the LS engine platform. By eliminating the Y-block design and utilizing conventional style main caps and oil pans, (stock pans can be used with Moroso oil pan spacers) Dart has addressed the problems resulting from the LS engine's separated crankcase bays. Windage is greatly reduced, resulting in increased power and improved lubrication.

This design change led to several additional improvements. The main webs are significantly stronger because the bay to bay breathing windows are eliminated in Dart’s design. Deleting the windows also allows the cylinder barrels to be extended by .375in into the crank case, providing greater piston support at the bottom of the stroke. Two standard bore sizes are available, 4.000 and 4.125. Maximum bore of 4.220.

All stock and aftermarket LS components can be utilized. Conventional style 4-bolt steel main caps are used. A 5/8 thick full deck design is utilized for superior strength, with six head bolts per cylinder to provide secure clamping. Dart’s priority main oiling system ensures high rpm reliability and includes provision for oil restrictors in the lifter valley.

Dart’s LS Next block is cast in the USA with premium cast
iron alloy or aluminum

Conventional style 4-bolt steel main caps with 7/16”
bolts are used

Full main webbing for maximum bottom end strength

Cylinder barrels are extended by .375” at the bottom,
providing greater piston support for all combinations

9.240 in deck height

Extra thick Siamese cylinder bores allow for larger
displacement capacity and a max bore size of 4.220 in

5/8 in thick full deck design with a 9.240 deck height

Six head bolts per cylinder provide secure clamping for
power adder applications

Head bolts are upgraded to 7/16 in for increased strength

Blind head bolt holes don’t go through into the water jacket

Provision for oil restrictors in the lifter valley

Revised low restriction priority main oiling system

Pro-Stock / Pro-Mod style stepped main oil galley

An external oil filter must be used with stock or
aftermarket oil pumps

Dual starter mounts

The water jacket on the #1 cylinder has been expanded for
additional cooling capacity

LSX style lifter bosses and dog bone provision are

LS Next Moroso Oil Pan Kit Available – SEE our AD

Business Phone Number: 704-397-7979
This item is NEW
Payment options:
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Item Location: MOORESVILLE, NC Get Directions To This City
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This ad expired 76 days ago.
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Ad posted by:
usaperform1 (#609157)

USA Performance Parts 1
1375 Deal Rd
Mooresville, NC 28115
(704) 397-7979
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Business Website
Member Since: 2012-01-03
Phone Number: 704-397-7979

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Average Accepted Sale Price: $0.00
Average Honor Payment: $0.00

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Execution Stats: 0.157 sec / 6.5 MB used / 6.7 MB peak