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Dart Race Series Small Block Chevy Aluminum Bare Blocks 31711212 Blocks, Series, Aluminum, 9.025 in Deck, 4.125 in. Bore, 4-Bolt Mains,2-Piece Rear Main Seals,BBC Cam Tunnel,® Block,Chevy, Each

SKU: DRT31711212

Engines, Bare Blocks

Dart Race Series Small Block Chevy Aluminum Bare Blocks 31711212 Blocks, Series, Aluminum, 9.025 in Deck, 4.125 in. Bore, 4-Bolt Mains,2-Piece Rear Main Seals,BBC Cam Tunnel,® Block,Chevy, Each

SKU: DRT31711212

Engines, Bare Blocks
A$14,631.75
Special Order. Contact for ETA. This item is out of stock in our warehouse and partner distribution centres. In some cases, this may be due to not having live inventory feeds available for all suppliers. Please contact us before ordering if you need to meet a specific deadline.
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Description

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

Part Type

Engines, Bare Blocks

Data: v4.2 - Upd: 2026-09-27 17:52:32

Specifications

Product Attributes - Brand
Dart
Product Attributes - Manufacturer's Part Number
31711212
Product Attributes - Part Type
Engines, Bare Blocks
Product Attributes - Product Line
Dart Race Series Small Block Chevy Aluminum Bare Blocks
Product Attributes - UPC
807051019117
Product Attributes - Main Journal Type
Chevy 350
Product Attributes - Engine Block Material
Aluminum
Product Attributes - Engine Block Style
Aftermarket
Product Attributes - Engine Block Deck Height
Standard deck
Product Attributes - Deck Height (in.)
9.025 in.
Product Attributes - Cylinder Bore as Shipped
4.115 in.
Product Attributes - Cylinder Bore Diameter
4.125 in.
Product Attributes - Maximum Bore Diameter (in.)
4.185
Product Attributes - Camshaft Location
Raised 0.391 in.
Product Attributes - Engine Block Weight (lbs.)
105 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 +.391 raised camshaft location.

Reference Information

Brand Name/s Dart
StreetFX SKU drt31711212
SFX Item ID 5089938
Supplier Item Code 5089938
Manufacturer SKU 31711212
Manufacturer UPC 807051019117
Alternative References 4-Bolt, 2-Piece

Compatibility

Application Data
  • MakeCHEVROLET
    Engine TypeV8
    Engine FamilyChevy small block Gen I
    Application NotesBlock has +.391 raised camshaft location.

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