What material are these pistons made from?

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

Are these pistons a direct fit for all LS engines?

This set is designed for 8-cylinder LS engines with a 4.070 inch bore. While they are specifically made for LS applications, it's always best to confirm the bore size and other specifications match your particular engine build.

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

The FSR design helps minimize friction and power loss by using a reduced skirt width and a shorter wrist pin. This also contributes to saving weight on the rotating assembly.

JE Pistons Forged Piston Set 312097 - LS Engines

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-t14-296278
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 from 2618 aluminum for high-demand LS engines.

Key Features

Fits 8-cylinder LS engines with a 4.070 inch bore.
Set includes 8 pistons, each with a dome design.
Forged in the USA from 2618 aluminum for high tensile strength.
Features JE Pistons' proprietary Forged Side Relief (FSR) design to minimize friction and save weight.
Includes a 0.927 inch wrist pin.
May include an accumulator groove to reduce ring flutter and improve ring seal.

This piston set is designed for 8-cylinder LS engines with a 4.070 inch bore. Please verify compatibility with your specific engine build.

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Product Details

If you're rebuilding the top end of your LS engine for serious performance, you're going to want pistons that can handle the stress. JE Pistons has been making forged pistons for decades, and this set is built specifically for LS applications. They're forged in the USA from 2618 aluminum, which gives them the high tensile strength needed for demanding builds, whether that's for the drag strip or just a really strong street engine.

What sets these apart is JE's proprietary Forged Side Relief (FSR) design. This means they've got a reduced skirt width and a shorter wrist pin, which not only saves weight but also helps minimize friction and power loss. Some applications also get an accumulator groove, which helps control combustion gas pressure, reducing ring flutter and improving the seal for consistent power delivery. Plus, many of these pistons come with a skirt coating that cuts down on friction and wear, making your engine run quieter and last longer.

This is a complete set of 8 pistons, ready to be installed in your LS engine. They feature a dome design, a 4.070-inch bore, and come with a 0.927-inch pin. Keep in mind these are not CARB approved and cannot be shipped to California. For a high-performance LS build, these pistons are a solid choice.