Engines and Components› Engines, Blocks and Components

ATK ENGINES

CHEVY 350 BARE BLOCK 4.030

$902.78

SKU: A040 13Z6

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

Professional / shop required

Description

The ATK North America 13Z6 is a high-performance cast iron engine block for Chevrolet small block applications. Designed to eliminate original factory defects, it features a 4.030-inch bore, 3.750-inch stroke, iron main caps, and a one-piece rear main seal.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

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

BrandATK ENGINES
Part NumberA040 13Z6

Videos

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ATK Performance crate engine review
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ATK review
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Jegs ATK 0282 Vortec 350 Crate Engine unboxing
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Part 2 Jegs ATK Vortec Crate Engine Tear Down
ATK 350 Engine Swap Review

ATK 350 Engine Swap Review

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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