Dart LS Next Cast Iron Block, 4.000" Bore, Std. Deck (9.240")

Dart LS Next Cast Iron Block
Dart's LS Next block is the first significant change in the architecture of the LS engine platform. By eliminating the "Y-block" design and utilizing conventional style main caps and oil pans, Dart has addressed the problems resulting from the LS engine's separated crankcase bays. Windage is greatly reduced, resulting in increased power along with a much stronger main web area. Note: special main bearings and oil pan must be used.

• Cast in the USA with premium cast iron alloy
• 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
• Extra thick Siamese cylinder bores allow for large displacement capacity and a max bore size of at least 4.200"
• A 5/8" thick full deck design with a 9.240" deck height
• Six head bolts per cylinder provide secure clamping force
• Head bolts are upgraded to 7/16" for increased strength
• Blind head bolt holes don't go through into the water jacket
• Revised low restriction priority main oiling system
• Pro-Stock/Pro-Mod big block style stepped main oil galley
• Water jacket on #1 cylinder is expanded for additional cooling capacity
• LSX style lifter bosses and dog bone provision are provided
• An external oil filter must be used with stock and aftermarket oil pumps