1 SET KB355.STD/1 SET 4000BD8.005

Name: 1 SET KB355.STD/1 SET 4000BD8.005
Brand: United Engine & Machine Co
SKU: U00B KB355KTD.STD
Price: 593.36 USD
Availability: InStock

$593.36

SKU: U00B KB355KTD.STD

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Description

The Keith Black KB355-STD Hypereutectic piston kit is for Ford Small Block 331 engines built from a Ford 302 block, featuring a 4.000-inch bore, 3.250-inch stroke, and 5.400-inch rod length. These dish-type pistons have a 10cc volume and are designed for high-performance applications, offering features like a low expansion alloy, machined head and valve reliefs, and an accumulator groove for improved ring seal.

Fitment

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Specifications

Brand	United Engine & Machine Co
Part Number	U00B KB355KTD.STD

Videos

124CI Keith Black/KB Pistons | Shop Talk Episode 18

Keith Black Hypereutectic Piston Info (Ring End Gap)

Engine Failure!? Watch if you are running Hypereutectic pistons!

KB Pistons and Ring End Gap

Installing Keith Black Pistons in the DZ292 Small Block Chevy #engine

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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