Engines and Components› Pistons and Piston Rings

Speed-Pro

Hypereutectic Pistons Set, 4.000" Bore, 1.560" Compression Distance

$322.99

SKU: H631CP

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In Stock
Ships by Jul 30
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30 Days Return
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Description

The Speed-Pro H631CP is a set of 8 hypereutectic pistons designed for street performance, brackets, and oval track racing. These pistons are constructed from an exclusive FM244 high silicon alloy and feature Duroshield anti-friction coated skirts.

They are weight-matched sets and are manufactured in advanced piston facilities. The pistons have a flat top style with two valve reliefs, a 4.000" cylinder bore, and a 1.560" compression distance. They are designed for use with a 3.480" crankshaft stroke and a 5.700" connecting rod (350ci).

Fitment

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Specifications

BrandSpeed-Pro
Part NumberH631CP
CategoryEngines and Components

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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