Exterior Components› Body Panels and Components

United Engine & Machine Co

SINGLE CAST PISTON 5.9L CHRY

$54.81

SKU: U00B S1273.020

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INSTALL DIFFICULTY
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Easy — 1–2 hours

Description

The Silv-O-Lite S1273.020 is a cast aluminum piston designed for Mopar small block LA engines with a 360 cubic inch displacement. It features a flat top piston style with no valve reliefs and a 4.020 inch bore.

This piston has a 1.576 inch compression height and uses a press-fit wrist pin. The ring groove thickness is specified as 5/64 in. x 5/64 in. x 3/16 in. It is sold individually and is a direct replacement for original equipment number 3549366.

Fitment

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Specifications

BrandUnited Engine & Machine Co
Part NumberU00B S1273.020

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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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