Exterior Components› Body Panels and Components

United Engine & Machine Co

SINGLE HYPER PISTON 7.4L GM

$51.43

SKU: U00B S3408H.030

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Description

The Silv-O-Lite S3408H.030 is a hypereutectic aluminum piston designed for specific Chevrolet and GMC big block V8 engines. It features a dish style with two valve reliefs and a bore size of 4.280 inches.

These pistons utilize an aluminum alloy high in silicon, offering greater strength, scuff resistance, and seizure resistance. They also provide improved groove wear and resistance to cracking in the crown area. Each piston is sold individually and includes a press-fit wrist pin.

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 S3408H.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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