What material are these JE Pistons made from?

These pistons are forged in the USA from 2618 aluminum. This material is chosen for its high tensile strength, making it well-suited 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?

This set is designed for 8-cylinder LS engines with a 4.005 inch bore. While engineered for specific LS applications, it's always best to confirm that the bore size and other specifications match your particular engine build.

JE Pistons Forged LS Piston Set 312093

Name: JE Pistons LS ASYM DOME Set of 8 Pistons
Brand: JE Pistons
SKU: je-pistons-je-pistons-ls-asym-dome-set-of-8-pistons-t14-296274
Price: 975.74 USD
Availability: BackOrder

JE Pistons LS ASYM DOME 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 DOME Set of 8 Pistons. Forged in the USA from 2618 aluminum for high-demand performance.

Key Features

Fits 8-cylinder LS engines with a 4.005 inch bore.
Forged in the USA from 2618 aluminum for high tensile strength and durability.
Proprietary Forged Side Relief (FSR) design minimizes friction and power loss.
Features a dome volume of 11.80 cc for optimized performance.
Includes a 0.927 inch wrist pin and a 1.304 inch compression distance.
May include an accumulator groove for improved ring seal and consistent power.

This piston set is designed for 8-cylinder LS engines. Please verify compatibility with your specific engine build and application.

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Product Details

If you're building a high-performance LS engine, a solid set of pistons is where it all starts. This set from JE Pistons is designed specifically for LS applications, offering a robust foundation for serious power. They're forged in the USA using 2618 aluminum, a material known for its high tensile strength, which is exactly what you need when you're pushing an engine hard.

JE Pistons brings over 75 years of experience to the table with these forged pistons. They feature a proprietary Forged Side Relief (FSR) design that helps reduce friction and power loss by using a narrower skirt and a shorter wrist pin, which also shaves off some weight. Depending on the specific application, you might also find an accumulator groove, which works to reduce combustion gas pressure, leading to better ring seal and more consistent power delivery. Some applications also include a skirt coating that further cuts down on friction and wear, while also quieting things down a bit. Every part of this set is made in the USA, ensuring you're getting a well-built component ready for demanding use.

This kit includes eight pistons, each with a 4.005-inch bore and a dome volume of 11.80 cc. The compression distance is 1.304 inches, and the pin diameter is 0.927 inches. Keep in mind that these pistons are not CARB approved and cannot be shipped to California. They are designed for specific engine and use applications, so be sure to confirm they match your build's requirements.