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United Engine & Machine Co

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

$73.48

SKU: U00B KB155.020

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INSTALL DIFFICULTY
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Description

The Keith Black KB155-020 is a set of 8 hypereutectic pistons designed for SB Chevy 327 engines. These pistons feature a 4.020" bore, 3.250" crankshaft stroke, and 6.000" rod length. They have a 3.2cc dome volume, 2 valve reliefs, and a compression height of 1.385".

Constructed from a low-expansion 390 alloy with 16% silicon, these pistons allow for tighter piston-to-wall running clearance. They include fully machined head and valve reliefs, triple spiral lock rings, CNC machined pin bores, an accumulator groove for improved ring seal, and machined-in oil returns. The set comes with wrist pins and spiral lock rings, but piston rings are not included.

Fitment

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Specifications

BrandUnited Engine & Machine Co
Part NumberU00B KB155.020

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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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