Dart Race Series Small Block Chevy Aluminum Bare Blocks 31711242 Blocks, Series, Aluminum, 9.075 in Deck, 4.125 in. Bore, 4-Bolt Mains,2-Piece Rear Main Seals,BBC Cam Tunnel,® Block,Chevy, Each
Dart Race Series Small Block Chevy Aluminum Bare Blocks 31711242 Blocks, Series, Aluminum, 9.075 in Deck, 4.125 in. Bore, 4-Bolt Mains,2-Piece Rear Main Seals,BBC Cam Tunnel,® Block,Chevy, Each
A$14,631.75
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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 drt31711242 SFX Item ID 5089092 Accounting SKU drt-31711242 Manufacturer SKU 31711242 Manufacturer UPC 807051019155 Alternative References 31711242, DRT-31711242
Data: v2 - Desc: v4.2 - Upd: 2026-10-14 03:26:08
Part Type
Engines, Bare Blocks
Specifications
Bare Blocks, Dart Race Series, Aluminum, 9.075 in Deck, 4.125 in. Bore, 4-Bolt Mains,2-Piece Rear Main Seals,BBC Cam Tunnel,® Small Block,Chevy, Each
With displacements up to 455 cubic inches, the Race Series small block Chevy aluminum bare blocks are an ideal starting point for any project that involves sprint cars, modifieds, late model stock, dragsters and unlimited competition classes.
Incorporated features include:
• Standard 9.025 in., tall deck 9.325 in. and 9.500 in. versions allow for greater versatility.
• Raised camshaft .391 in. (4.912 in. camshaft to crankshaft centerlines) provides more clearance for stroker cranks and eliminates need for fragile small base circle cams. Option for .434 raised cam also available
• Relocated oil pan rails are spread .400 in. per side (.800 in. wider than stock) to increase crank/rod clearance and reduce windage losses
• Siamesed cylinders: Standard 4.000 in. or 4.125 in. cylinder can be safely bored to 4.185 in. (ductile iron sleeves and extr-thick walls prevent cracking and produce excellent ring seal
• Oil pan bolt holes are relocated in line with main caps to eliminate interference with rotating assembly
• Main bearing bores are available for 350 (2.45 in.) and 400 (2.65 in.) bearings allow engine builders to maximize crankshaft strength and minimize friction
• 4 bolt billet steel main caps have splayed outer bolts minimize bearing bore distortion
• Big block camshaft bearings allow use of cams with larger base circle diameter to improve strength and resist twisting with cam driven pumps
• Dual starter mounts allow starter to be mounted on either side of block for chassis and oil pan clearance
• Front and rear external oil inlets, crossover and restrictor provisions to simplify plumbing with external pump
• Scalloped outer water jacket walls improve coolant flow around the cylinder barrels to equalize temperatures
• Coated cam bearings, freeze plugs and dowels are included
| Product Attributes | |
|---|---|
| Brand | Dart |
| Manufacturer's Part Number | 31711242 |
| Part Type | Engines, Bare Blocks |
| Product Line | Dart Race Series Small Block Chevy Aluminum Bare Blocks |
| UPC | 807051019155 |
| Main Journal Type | Chevy 350 |
| Engine Block Material | Aluminum |
| Engine Block Style | Aftermarket |
| Engine Block Deck Height | Tall deck |
| Deck Height (in.) | 9.075 in. |
| Cylinder Bore as Shipped | 4.115 in. |
| Cylinder Bore Diameter | 4.125 in. |
| Maximum Bore Diameter (in.) | 4.185 |
| Camshaft Location | Raised 0.391 in. |
| Engine Block Weight (lbs.) | 105 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 +.391 raised camshaft location. |
Reference Information
| Brand Name/s | Dart |
|---|---|
| StreetFX SKU | drt31711242 |
| SFX Item ID | 5089092 |
| Supplier Item Code | 5089092 |
| Manufacturer SKU | 31711242 |
| Manufacturer UPC | 807051019155 |
| 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 small block Gen I |
| Application Notes | Block has +.391 raised camshaft location. |
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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