Engines and Components› Pistons and Piston Rings

United Engine & Machine Co

1 SET KB231.STD/1 SET 4000BD8.005

$629.04

SKU: U00B KB231KTD.STD

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

Moderate — 2–4 hours

Description

The KB231KTD.STD Hyper Performance Piston Kit from United Engine & Machine Co. is a high-quality hypereutectic piston set designed for Chevrolet Small Block V8 Gen I 5.7L (350 cubic inches) engines from 1958-2007. It features a flat top 2V crown, +6cc volume, and is made from durable 390 alloy.

Fitment

Fitment Guaranteed

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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

BrandUnited Engine & Machine Co
Part NumberU00B KB231KTD.STD

Videos

Engine Failure!? Watch if you are running Hypereutectic pistons!

Engine Failure!? Watch if you are running Hypereutectic pistons!
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KB Pistons and Ring End Gap
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Keith Black Hypereutectic Piston Info (Ring End Gap)
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How To Install Piston Spiro Locks
Sbc 383 build part 2 - ring gap check and piston install

Sbc 383 build part 2 - ring gap check and piston install

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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