What material are these JE Pistons made from?

These pistons are forged from 2618 aluminum. This material is chosen for its high tensile strength, which is necessary for high-demand performance applications like racing engines.

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

The FSR forging design helps to minimize friction and power loss by reducing the piston skirt width. This design also contributes to saving weight, especially when paired with a shorter wrist pin.

Are these pistons compatible with all LS engines?

This set is designed for LS engines with a 4.155-inch bore. While they are built for performance, it's important to confirm that this specific bore size and piston design are suitable for your particular LS engine build and intended use.

JE Pistons LS Piston Set 312131 - Forged 4.155in Bore

Name: JE Pistons LS ASYM DM 4100STRKR Set of 8 Pistons
Brand: JE Pistons
SKU: je-pistons-je-pistons-ls-asym-dm-4100strkr-set-of-8-pistons-t14-296302
Price: 975.74 USD
Availability: BackOrder

JE Pistons LS ASYM DM 4100STRKR 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 4100STRKR Set of 8 Pistons. Forged from 2618 aluminum for high-demand performance applications.

Key Features

Fits 8-cylinder engines with a 4.155-inch bore.
Forged from 2618 aluminum for high tensile strength in performance applications.
Proprietary Forged Side Relief (FSR) design minimizes friction and power loss.
Features a dome volume of -1.7cc.
Includes a 0.927-inch pin diameter.
Manufactured 100% in the USA.

This is a universal piston set for 8-cylinder engines with a 4.155-inch bore. Please verify compatibility with your specific engine build.

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Product Details

If you're building a high-performance LS engine for racing or serious street use, a strong set of pistons is crucial. This JE Pistons LS ASYM DM 4100STRKR set is designed to handle the demands of boosted or naturally aspirated performance builds. They're forged from 2618 aluminum, a material known for its high tensile strength, making these pistons well-suited for high-stress environments where durability and consistent performance are key.

JE Pistons has applied over 75 years of experience to create these pistons, which are manufactured 100% in the USA. They feature a proprietary Forged Side Relief (FSR) forging design that helps minimize friction and power loss by reducing skirt width, and a shorter wrist pin further saves weight. Depending on the specific application, these pistons may also include an accumulator groove to reduce combustion gas pressure, improving ring seal and preventing flutter. A skirt coating, also application-dependent, is used to reduce friction and wear on the piston skirts and cylinder walls, which can also lead to quieter operation.

This set includes eight pistons, each with a 4.155-inch bore and a dome volume of -1.7cc, designed specifically for LS engines. While these pistons are built for extreme performance, please note they are not CARB approved and cannot be shipped to California. For a robust LS engine build, these JE Pistons offer a well-built foundation.