Exterior Components› Body Panels and Components

United Engine & Machine Co

SNGL HYP/CTD PISTON 8.1L GM

$62.58

SKU: U00B S3494HC.030

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

Professional / shop required

Description

The Silv-O-Lite S3494HC.030 is a hypereutectic piston designed for engine rebuilding. It features a flat top crown with two valve reliefs and hyper-coated skirts.

Constructed from a Cast 390 Hypereutectic Alloy, this piston offers improved strength, scuff, and seizure resistance. It utilizes a floating pin type with an offset pin configuration and has a bore diameter of 4.25 inches (108 mm).

Fitment

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Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

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Specifications

BrandUnited Engine & Machine Co
Part NumberU00B S3494HC.030

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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