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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
Part Type: Engine Block
Application: Chevrolet LS
Engine Block Style: Aftermarket
Engine Block Material: Cast Iron
Main Journal Type: LS Main
Deck Height: 9.240"
Cylinder Bore Diameter: 4.125"
Finished Cylinder Bores: No
Main Caps Included: Yes
Main Cap Material: Billet Steel
Main Bolt Style: 4-Bolt
Main Cap Fasteners Included: Yes, 7/16"
Lifter Bore Diameter: .842"
Camshaft Bore: Standard
Provisions for OE Roller Lifters: No
Main Bearings Included: No
Rear Main Seal Style: Stock LS
Oil Pan Rail Type: Moroso, Canton and Stef's, or Moroso pan rail spacers
Raised Cam Location: No
Cam Bearings Included: No
Freeze Plugs Included: No
Manufacturer: Dart Machinery
Manufacturer's Part Number: 31837211
Weight: 227.0 lbs.
Warranty: Dart Machinery, Ltd. warrants to the original purchaser its products to be free from defects in materials and workmanship within 6 months from the date of sale. Dart's obligation under this warranty shall be limited to repair or replacement, at Dart's option, of any parts or products which may prove defective under normal use. This warranty shall not apply to any parts or products which have been subject to accident, negligence, alteration, abuse, or misuse.
Quantity: Sold as Each
Note: Special main bearings (CEPMS2321H) and oil pan must be used.
*This Block Qualifies for Free Freight!
(48 U.S. Contiguous only. Residential/Lift Gate Fees may apply.)
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