Engines and Components› Engines, Blocks and Components

Dart

BIG M PRO IRON BIG BLOCK CHEVY BLO

$5,979.90

SKU: D00Q 31213445

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Special Order
Ships in 4–6 weeks
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Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Advanced — 4+ hours

Description

The Dart 31213445 is a Big M2 Engine Block designed for Big Block Chevy (BB Chevy) engines. It features a 9.800" deck height, 4.500" bore size (max 4.625"), and a raised cam location of +.400". The block is made from 220 BHN cast iron and includes 4-bolt billet steel main caps with splayed outer bolts, a true priority main oil system, and is designed for +.300" tall Gen VI style lifters.

Fitment

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Specifications

BrandDart
Part NumberD00Q 31213445

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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