What material are these JE Pistons made from?

These pistons are forged from 2618 aluminum. This material is selected for its high tensile strength, which is crucial for high-demand performance applications.

What is the purpose of the Forged Side Relief (FSR) design?

The FSR design helps to minimize friction and power loss. It achieves this through a reduced skirt width and a shorter wrist pin, which also contributes to saving weight.

Are these pistons compatible with all LS engines?

These pistons are designed specifically for LS engines and their intended use. However, due to the variety of LS engine builds, it's important to verify the specific bore size and compression requirements against your engine's specifications.

JE Pistons LS ASYM DM 4000STRKR Piston Set 312108

Name: JE Pistons LS ASYM DM 4000STRKR Set of 8 Pistons
Brand: JE Pistons
SKU: je-pistons-je-pistons-ls-asym-dm-4000strkr-set-of-8-pistons-t14-296286
Price: 975.74 USD
Availability: BackOrder

JE Pistons LS ASYM DM 4000STRKR Set of 8 Pistons

$975.74

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

JE Pistons LS ASYM DM 4000STRKR Set of 8 Pistons. Forged in the USA for high-demand performance applications.

Key Features

Set includes 8 pistons with a 4.030 inch bore.
Forged in the USA using 2618 aluminum for high tensile strength.
Proprietary Forged Side Relief (FSR) design minimizes friction and power loss.
Features a dome volume of 4.30 cc.
Includes a 0.927 inch wrist pin.
Designed specifically for each engine and use application for optimized performance and durability.

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Product Details

These JE Pistons LS ASYM DM 4000STRKR pistons are forged from 2618 aluminum, a material chosen for its high tensile strength, making them well-suited for high-demand performance applications. They are designed specifically for the LS engine and its intended use, aiming for an optimal balance of performance and durability. Each piston features a proprietary Forged Side Relief (FSR) design, which helps reduce friction and power loss by using a narrower skirt width and a shorter wrist pin, contributing to weight savings.

The pistons are manufactured 100% in the USA, reflecting JE Pistons' extensive experience in forged racing components. Depending on the specific application, these pistons may also include an accumulator groove to manage combustion gas pressure, which can reduce ring flutter and improve ring seal for more consistent power delivery. Some applications also benefit from a skirt coating that further reduces friction and wear on the piston skirts and cylinder walls, while also helping to quiet down operating noise.

This set includes eight pistons, each with a 4.030-inch bore and a dome volume of 4.30 cc. The compression distance is 1.115 inches, and the wrist pin diameter is 0.927 inches. Please note that these pistons are not CARB approved and cannot be shipped to California.