Exterior Components› Body Panels and Components

SEALED POWER

CAST PISTON

$84.95

SKU: S03T H634CP 30

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Special Order
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Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Beginner — under 30 min

Description

The Sealed Power H634CP30 is a set of hypereutectic pistons designed for performance applications. These pistons feature a dome with two valve reliefs and are constructed from a high-strength aluminum alloy with 16 percent silicon for enhanced strength and wear resistance. They are molded using permanent-mold technology to ensure precise fit and tight bore clearances.

The H634CP30 pistons have a bore diameter of 4.155 inches (105.537mm) and a stroke of 3.750 inches, with a stock engine stroke type. The compression height is 1.425 inches, and they have a piston head volume of -0.20cc. The wrist pin style is press-fit or floating, with wrist pin retainers and the wrist pin itself included. The piston ring thickness is specified as 5/64 in. x 5/64 in. x 3/16 in. These pistons are sold as a set of 8 and feature a coated skirt.

Fitment

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Specifications

BrandSEALED POWER
Part NumberS03T H634CP 30

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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