Engines and Components› Pistons and Piston Rings

United Engine & Machine Co

KB HYPER PISTON EVOLUTION DOME 16.5CC 80CI 1340CC 198499 ROD7.440

$99.43

SKU: U00B KB266.STD

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Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Easy — 1–2 hours

Description

The United Engine & Machine Co KB266.STD is a set of pistons designed for Big Twin 84-99 models with Evolution Engines. These pistons are constructed from a hypereutectic alloy, which is a cast material containing 16% silicon. This composition results in a low thermal expansion rate, allowing for tighter piston-to-cylinder clearance.

Fitment

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Specifications

BrandUnited Engine & Machine Co
Part NumberU00B KB266.STD

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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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