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United Engine & Machine Co

CHEVROLET 377/400 ROD 5.7/5.565 DISH +12CC 2V KB HYPER PISTON SET

$75.25

SKU: U00B KB159.020

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Description

The United Engine & Machine Co KB159.020 is a set of eight hypereutectic pistons designed for SBC 377 and 400 engines. These pistons feature a dish with 12cc volume and a 4.145" bore size. They are compatible with a 3.480" stroke and 5.700" rod length, or a 3.750" stroke and 5.565" rod length.

The pistons have a compression height of 1.561" and utilize a 5/64" x 5/64" x 3/16" ring size. The set includes wrist pins and spiral lock rings, but the piston rings themselves are not included. The pistons are constructed from a low-expansion 390 alloy with 16% silicon for tight running clearance and are suitable for high-performance applications.

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Specifications

BrandUnited Engine & Machine Co
Part NumberU00B KB159.020

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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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