Exterior Components› Body Panels and Components

United Engine & Machine Co

FORD 351W ROD 5.956 DCUP +22CC 2V KB HYPER PISTON SET

$76.43

SKU: U00B KB181.030

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

Moderate — 2–4 hours

Description

The Keith Black KB181-030 is a set of 8 hypereutectic pistons designed for Ford 351W engines. These pistons feature a dish-style top with 22cc volume and a 4.030" bore size. They are constructed from a low-expansion 390 alloy with 16% silicon, allowing for tighter piston-to-wall clearance.

Key features include fully machined valve reliefs, triple spiral lock rings, and CNC-machined pin bores for accuracy. The pistons also incorporate machined-in oil returns and diamond-finished skirts for durability and performance. Wrist pins and spiral locks are included, but piston rings are sold separately with a 5/64" x 5/64" x 3/16" size specification.

Fitment

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Specifications

BrandUnited Engine & Machine Co
Part NumberU00B KB181.030

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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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