Exterior Components› Body Panels and Components

United Engine & Machine Co

CHEVROLET 327 ROD 5.700 FLAT TOP +7CC 2V KB HYPER PISTON SET

$70.82

SKU: U00B KB156.040

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Description

The United Engine & Machine Co KB156.040 is a set of eight KB Series hypereutectic pistons designed for Small Block Chevy engines. These pistons feature a 4.040 inch bore and 5/64 x 5/64 x 3/16 inch ring grooves.

Constructed from a high-silicon aluminum alloy, these pistons are lightweight for improved throttle response and RPM changes. They are engineered with race-ready features including high upper compression-ring locations, gas-accumulator grooves, drilled oil returns, and spiral-lock retainer grooves.

Fitment

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Specifications

BrandUnited Engine & Machine Co
Part NumberU00B KB156.040

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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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