Engines and Components› Pistons and Piston Rings

JE Pistons

LS ASYM FT 3.900 STRK

$1,017.77

SKU: J001 323983

In Stock
In Stock
Ships by Jun 7
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Advanced — 4+ hours

Description

The JE Pistons 323983 Asymmetrical FSR (Forged Side Relief) flat top pistons are designed for GM LS Gen III/IV engines, featuring a 4.070 bore. This set is crafted from high-strength, lightweight 2618 forged material, and includes features like accumulator grooves, double pin oilers, and offset wrist pins for enhanced performance and durability. They accommodate 1.2mm, 1.5mm, and 3.0mm rings and eliminate reluctor wheel clearance issues for popular stroke/rod combos.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandJE Pistons
Part NumberJ001 323983

Videos

JE Pistons Asymmetrical Design Overview

JE Pistons Asymmetrical Design Overview

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.

View Full Return Policy