Pro Star™ 509 CID Big Block Chevy Shortblock featuring DART™ Big M Block

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Online Price $3,895.00

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Quick Overview

•Dart™ Big M Block
•Forged pistons
•4.00 Stroke, 4.500 Bore

This 509 CID shortblock engine is brand new and assembled with high quality components.

BBC High Performance Chevy Crate Engine Shortblock

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  • BBC High Performance Chevy  Crate Engine Shortblock
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Online Price $3,895.00


509 CID Big Block engine featuring a new Dart™ Big M block. This shortblock is supplied with bearings, crank, pistons and rods. These blocks are machined and assembled to exact tolerances with the highest quality parts.

This Pro Star™ 509 shortblock is supplied with 2618 forged pistons, 4340 I-Beam rods and a Scat 9000 series cast crank (4340 forged crank with H-beam rods optional).

Dart™ Big M blocks have many features that make them superior to their competition including a priority main oiling system, siamese cylinder bores with extra-thick walls and a variety of other benefits (see the Block section for more details). These new Dart™ blocks are the obvious choice for serious performance and durability.

Additional Information

Block NEW Dart™ Big M Block
Featuring upgrades including...

True Priority Main Oiling System
Siamese cylinder bores with extra-thick walls that resist cracking and improve ring seal for more power
• Extra thick decks ensure reliable head gasket seal
• Blind head bolts don't go through to water jacket
Splayed outer bolts on middle main bearing caps
• All OE bolt holes for starter, clutch ball, etc...
Short Block Features • Deck height 9.800"
• Rods 6.385
• Stroke 4.00
• Bore 4.500
• 2618 Forged Pistons
• Scat 9000 series Cast Crank (Optional 4340 forged crank)
• 4340 Forged Rods
• Brass frost plugs
• Moly piston rings
• HP cam bearings
• Internally balanced
Camshaft Advertised Duration Optional
Camshaft Duration @ .050" Optional
Camshaft Lift Optional
Heads Not supplied
Additional Parts Included N/A
Options *Compression ratios listed are based on a cylinder head with 121cc combustion chambers.
Horsepower N/A
Torque N/A
Warranty Click here for warranty overview