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Dart

BBC IR/BLK S 10.4004.500 NO KIT +400 RC

$5,044.24

SKU: D00Q 31223495

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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

Dart engineered the Big M2 to be the strongest, most reliable, and easiest to build big block on the market. Part 31223495 features a 10.400 in. deck height, 4.500 in. bore, a +.400 in. raised cam location, ductile iron 4-bolt main caps, standard mains and 220 BHN Cast Iron. A true racing BBC block with raised +.400 cam location, siamese cylinder walls, priority main oiling, .842 lifter bores, press-fit freeze plugs and a 2-piece rear seal. Big M2 parts kit included.

Fitment

Fitment Guaranteed

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Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandDart
Part NumberD00Q 31223495

Videos

David Freiburger's Quest for 1,000HP NA with Dart 582 BBC

David Freiburger's Quest for 1,000HP NA with Dart 582 BBC
Tim Talks 555ci BBC Short Blocks

Tim Talks 555ci BBC Short Blocks

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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