Exterior Components› Body Panels and Components

United Engine & Machine Co

CHRYSLER 440 ROD 6.768 FLAT TOP +5CC 2V KB HYPER PISTON SET

$78.44

SKU: U00B KB237.030

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Description

The United Engine & Machine Co KB237.030 is a set of pistons designed for performance applications. These hypereutectic aluminum pistons feature a flat top with two valve reliefs and a 4.350-inch bore. They are sold as a set of 8 and include wrist pins and retainers.

The pistons are made from a 390 aluminum alloy, heat-treated to T6 standards for increased strength. They are CNC-machined for precision, with features like a high upper compression-ring location, gas-accumulator groove, and drilled oil returns. The lightweight, rigid-rib skirt design helps stabilize the piston in the bore, contributing to improved oil control, reduced blow-by, and increased ring life.

Fitment

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Specifications

BrandUnited Engine & Machine Co
Part NumberU00B KB237.030

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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