Exterior Components› Body Panels and Components

United Engine & Machine Co

CHEVROLET 377 ROD 6.000 DCUP +18CC 2V KB HYPER PISTON SET

$70.43

SKU: U00B KB350.020

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Description

The Keith Black KB350-020 is a set of 8 hypereutectic pistons designed for SBC 377 applications. These pistons feature a dish style with 2 valve reliefs and a compression height of 1.261 inches. The bore size is 4.145 inches, with a crankshaft stroke of 3.480 inches and a rod length of 6.000 inches.

Constructed from a low-expansion 390 alloy with 16% silicon, these pistons allow for tighter running clearance. They include fully machined head and valve reliefs, triple spiral lock rings, CNC machined pin bores, an accumulator groove, and machined-in oil returns. The skirts are diamond finished and feature mini grooves to reduce scuffing. Wrist pins and spiral locks are included, but piston rings are sold separately.

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Specifications

BrandUnited Engine & Machine Co
Part NumberU00B KB350.020

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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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