Dart Big M2 Pro Series Block Chevy Cast Iron Bare Blocks 31213445 Blocks, M Series, Iron, 9.80 in. Deck Height, 4.250 in. Bore, 4-Bolt Main, 2-Piece Rear Main Seal, Block, Chevy, Each
Dart Big M2 Pro Series Block Chevy Cast Iron Bare Blocks 31213445 Blocks, M Series, Iron, 9.80 in. Deck Height, 4.250 in. Bore, 4-Bolt Main, 2-Piece Rear Main Seal, Block, Chevy, Each
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A$11,608.60
A$13,095.93
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Description
IMPORTANT NOTICE: Images are supplied by the manufacturer and may be generic. While all efforts are made to provide accurate pictures, there may be differences in the actual product, such as colour, quantity, version, or included components. Please carefully review the description and specifications for details on inclusions or any variations. Some items may be sold individually or in sets, and images may occasionally depict additional products or quantities not included in your purchase. For assistance or clarification, please contact customer support.Reference Information Reference Data (Provide these details to our support team) Brand Name/s Dart StreetFX SKU drt31213445 SFX Item ID 5089955 Accounting SKU drt-31213445 Manufacturer SKU 31213445 Manufacturer UPC 807051046342 Alternative References 31213445, DRT-31213445
Data: v2 - Desc: v4.2 - Upd: 2026-10-14 03:26:21
Part Type
Engines, Bare Blocks
Specifications
Bare Blocks, Dart Big M Series, Cast Iron, 9.80 in. Deck Height, 4.250 in. Bore, 4-Bolt Main, 2-Piece Rear Main Seal, Big Block, Chevy, Each
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.
| Product Attributes | |
|---|---|
| Brand | Dart |
| Manufacturer's Part Number | 31213445 |
| Part Type | Engines, Bare Blocks |
| Product Line | Dart Big M2 Pro Series Big Block Chevy Cast Iron Bare Blocks |
| UPC | 807051046342 |
| Main Journal Type | Chevy 454 |
| Engine Block Material | Cast iron |
| Engine Block Style | Aftermarket |
| Engine Block Deck Height | Standard deck |
| Deck Height (in.) | 9.800 in. |
| Cylinder Bore as Shipped | 4.490 in. |
| Cylinder Bore Diameter | 4.500 in. |
| Maximum Bore Diameter (in.) | 4.600 |
| Camshaft Location | Raised 0.400 in. |
| Engine Block Weight (lbs.) | 280 lbs. |
| Main Bolt Style | 4-bolt |
| Main Caps Included | Yes |
| Main Cap Material | Billet steel |
| Main Cap Fasteners Included | Yes |
| Main Bearings Included | No |
| Rear Main Seal Style | 2-piece |
| Finished Cylinder Bores | No |
| Raised Cam Location | Yes |
| Cam Bearings Included | No |
| Freeze Plugs Included | Yes |
| Remanufactured | No |
| Quantity | Sold individually. |
| Notes | Block has +.400 raised camshaft location. |
Reference Information
| Brand Name/s | Dart |
|---|---|
| StreetFX SKU | drt31213445 |
| SFX Item ID | 5089955 |
| Supplier Item Code | 5089955 |
| Manufacturer SKU | 31213445 |
| Manufacturer UPC | 807051046342 |
| Alternative References | 4-Bolt, 2-Piece |
Compatibility
No specific fitment data available for this part. For clarification, please contact us.
Detailed Compatibility
| Application Data | |
|---|---|
| Make | CHEVROLET |
| Engine Type | V8 |
| Engine Family | Chevy big block Mark IV |
| Application Notes | This Dart block is set up for a .400 raised camshaft |
This may not be an exhaustive list of compatible vehicles. Please reach out to one of our representatives if you are unsure or do not see your vehicle here.
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