Exterior Components› Body Panels and Components

United Engine & Machine Co

HYPER PISTON 2.2L FORD/MAZDA

$80.73

SKU: U00B 3121H.5MM

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Description

The United Engine & Machine Co 3121H.5MM is a set of four hypereutectic pistons designed for stock engine stroke types. These pistons feature a dish style with four valve reliefs and are constructed from a hypereutectic aluminum alloy for increased strength and resistance to scuffing and seizure. They are designed with reinforced top lands and diamond-finished skirts.

The pistons have a bore of 86.500mm (3.406 in.) and a compression height of 1.420 in. They include a press-fit style wrist pin and have a pin diameter of 0.866 in. The ring grooves are sized for 1.50mm x 1.50mm x 4.00mm rings. Each piston has a head volume of +11.00cc and features a recessed piston head measuring 2.570 in. in diameter and 0.355 in. deep.

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Specifications

BrandUnited Engine & Machine Co
Part NumberU00B 3121H.5MM

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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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