Exterior Components› Body Panels and Components

United Engine & Machine Co

CHEVROLET 327 ROD 6.000 SOLID DOME 3.3CC 2V KB HYPER PISTON SET

$73.48

SKU: U00B KB155.030

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

Professional / shop required

Description

The United Engine & Machine Co KB155.030 is a set of eight hypereutectic dome pistons designed for performance builds. These pistons feature a 4.030-inch bore size, 3.250-inch crankshaft stroke, and a 6.000-inch rod length.

Constructed from a low-expansion 390 alloy with 16 percent silicon, these pistons allow for tighter running clearances. They include fully machined head and valve reliefs, CNC-machined pin bores, and accumulator grooves for enhanced ring seal. Wrist pins and spiral locks are included, but piston rings are sold separately.

Fitment

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Specifications

BrandUnited Engine & Machine Co
Part NumberU00B KB155.030

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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