Exterior Components› Body Panels and Components

United Engine & Machine Co

7000 CHEVROLET 454 (V8) ROD 6.135 OC HOLLOW DOME 26CC 1V KB HYPER PISTON SET

$74.83

SKU: U00B KB257.060

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Description

The United Engine & Machine Co KB257.060 is a set of hypereutectic pistons designed for performance applications. These pistons are cast from a 390 alloy with 16% silicon and feature a T-6 heat treat for enhanced strength. They include machining features found in next-generation forgings and offer advantages in compression-restricted classes.

These pistons boast lower conductivity alloy and reflective tops that help reduce oil and combustion temperatures, thereby lowering lost pressure. Their tight suggested clearances contribute to quiet operation and reduced oil consumption. The KB257.060 includes lock rings and pins at no extra charge.

Fitment

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Specifications

BrandUnited Engine & Machine Co
Part NumberU00B KB257.060

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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