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Dart Big M2 Pro Series Block Chevy Cast Iron Bare Blocks 31213545 Blocks, M Series, Iron, 9.800 in. Deck Height, 4.560 in. Bore, 4-Bolt Main, 2-Piece Rear Main Seal, Block, Chevy, Each

SKU: DRT31213545

Engines, Bare Blocks

Dart Big M2 Pro Series Block Chevy Cast Iron Bare Blocks 31213545 Blocks, M Series, Iron, 9.800 in. Deck Height, 4.560 in. Bore, 4-Bolt Main, 2-Piece Rear Main Seal, Block, Chevy, Each

SKU: DRT31213545

Engines, Bare Blocks

Sale ends in Calculating...

A$11,608.60 A$13,095.93
BACKORDER This item will be special ordered in for you. Contact us prior to purchase if you require an ETA.
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Description

Dart engineered the Big M to be the strongest, most reliable, and easiest-to-build big block on the market. Dart Big M2 Pro Series big block Chevy cast iron bare blocks are designed from the ground up as a true racing engine block which can be used with standard off the shelf big block components. The Big M2 is cast from premium high-strength iron and beefed up in all the critical areas. A competition oiling system ensures adequate lubrication to the main bearings at high RPM. With deck heights from 9.600 in. to 11.100 in., a +.600 in. raised cam location, spread oil pan rails and bore sizes up to 4.600 in., the Big M Pro gives you the versatility to build a wide variety of engine combinations.

Part Type

Engines, Bare Blocks

Data: v4.2 - Upd: 2026-09-27 17:52:27

Specifications

Product Attributes - Brand
Dart
Product Attributes - Manufacturer's Part Number
31213545
Product Attributes - Part Type
Engines, Bare Blocks
Product Attributes - Product Line
Dart Big M2 Pro Series Big Block Chevy Cast Iron Bare Blocks
Product Attributes - UPC
807051046366
Product Attributes - Main Journal Type
Chevy 454
Product Attributes - Engine Block Material
Cast iron
Product Attributes - Engine Block Style
Aftermarket
Product Attributes - Engine Block Deck Height
Standard deck
Product Attributes - Deck Height (in.)
9.800 in.
Product Attributes - Cylinder Bore as Shipped
4.550 in.
Product Attributes - Cylinder Bore Diameter
4.560 in.
Product Attributes - Maximum Bore Diameter (in.)
4.625
Product Attributes - Camshaft Location
Raised 0.400 in.
Product Attributes - Engine Block Weight (lbs.)
280 lbs.
Product Attributes - Main Bolt Style
4-bolt
Product Attributes - Main Caps Included
Yes
Product Attributes - Main Cap Material
Billet steel
Product Attributes - Main Cap Fasteners Included
Yes
Product Attributes - Main Bearings Included
No
Product Attributes - Rear Main Seal Style
2-piece
Product Attributes - Finished Cylinder Bores
No
Product Attributes - Raised Cam Location
Yes
Product Attributes - Cam Bearings Included
No
Product Attributes - Freeze Plugs Included
Yes
Product Attributes - Remanufactured
No
Product Attributes - Quantity
Sold individually.
Product Attributes - Notes
Block has +.400 raised camshaft location.

Reference Information

Brand Name/s Dart
StreetFX SKU drt31213545
SFX Item ID 5089359
Supplier Item Code 5089359
Manufacturer SKU 31213545
Manufacturer UPC 807051046366
Alternative References 4-Bolt, 2-Piece

Compatibility

Application Data
  • MakeCHEVROLET
    Engine TypeV8
    Engine FamilyChevy big block Mark IV
    Application NotesThis Dart block is set up for a .400 raised camshaft

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