Engines and Components› Pistons and Piston Rings

JE Pistons

JE Pistons LS ASYM FT 4.100STRK Set of 8 Pistons

$949.99

SKU: J001 311991

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INSTALL DIFFICULTY
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Professional / shop required

Description

The JE Pistons 311991 is a lightweight and durable asymmetrical FSR flat top piston designed for GM LS Gen III/IV engines, specifically for stroked LS2 builds. It features a 4.005 bore, 4.100 crankshaft stroke, and 6.125 rod length. This piston kit includes accumulator grooves, double pin oilers, an offset wrist pin, and is machined for 1.2mm, 1.5mm, 3.0mm rings.

Fitment

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Specifications

BrandJE Pistons
Part NumberJ001 311991

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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