What material are these JE Pistons made from?

These pistons are forged from 2618 aluminum. This material is chosen for its high tensile strength, making it suitable for high-demand performance applications.

Are these pistons a direct replacement for all LS engines?

This set is designed for LS engines with a specific 4.130 inch bore. While designed for LS applications, you should always confirm the bore size and other specifications match your engine's requirements before purchasing.

What does the 'ASYM DOME' designation mean?

The 'ASYM DOME' refers to the specific shape of the piston crown, which is designed to optimize combustion chamber shape and performance for certain LS engine configurations. The 'Set of 8' indicates it's a complete kit for a V8 engine.

JE Pistons Forged Piston Set 312101

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-t14-296280
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 for high-demand LS engine builds.

Key Features

Fits LS engines with a 4.130 inch bore.
Set includes 8 forged pistons made from 2618 aluminum for high tensile strength.
Proprietary Forged Side Relief (FSR) design minimizes friction and power loss.
Features an accumulator groove (application dependent) to improve ring seal.
Skirt coating (application dependent) reduces friction and wear.
Engineered and forged 100% in the USA.

This piston set is designed for LS engines with a 4.130 inch bore. Please verify compatibility with your specific engine configuration.

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Product Details

If you're building a high-performance LS engine, a solid set of pistons is crucial. This set from JE Pistons, part number 312101, is designed specifically for LS applications and is forged right here in the USA. JE Pistons brings over 75 years of experience to the table, focusing on creating pistons that offer the best blend of strength and performance for demanding builds, whether you're hitting the drag strip or the track.

These pistons are made from 2618 aluminum, a material chosen for its high tensile strength, which is exactly what you need when pushing an engine hard. They feature a proprietary Forged Side Relief (FSR) design that helps cut down on friction and power loss by using a narrower, shorter skirt and wrist pin, saving weight in the process. Depending on the specific LS engine this set is for, you might also find an accumulator groove to help manage combustion gas pressure, leading to better ring seal and more consistent power. Some applications also include a skirt coating that further reduces friction and wear on the piston skirts and cylinder walls, which can also help quiet down the engine's operation.

This kit includes eight pistons, each with a 4.130-inch bore and a dome shape. The kit also specifies a 1.304-inch compression distance and a 0.927-inch pin diameter. It's important to note that these pistons are not CARB approved and cannot be shipped to California. For any LS engine build where durability and performance are top priorities, this JE Pistons set is a well-built choice.