Engines and Components› Pistons and Piston Rings

JE Pistons

LS ASYM DM 4100STRKR

$226.10

SKU: J001 312122L

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Description

The JE Pistons 312122L is a forged dome piston designed for GM LS engines. It features an asymmetrical Forged Side Relief (FSR) forging design, which provides a larger skirt on the major thrust side and a smaller skirt on the minor thrust side to reduce friction and weight. This piston is machined for 1.2mm, 1.5mm, and 3.0mm rings and includes combination 12° & 15° valve pockets.

Fitment

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Specifications

BrandJE Pistons
Part NumberJ001 312122L

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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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