What material are these pistons made from?

These pistons are forged from 2618 aluminum. This material is chosen for its high tensile strength, which is necessary to withstand the high demands of performance engine applications.

What is the purpose of the FSR design?

The proprietary Forged Side Relief (FSR) forging design helps to minimize friction and power loss. It achieves this by reducing the piston skirt width and utilizing a shorter wrist pin, which also contributes to saving weight.

Are these pistons compatible with all LS engines?

These pistons are specifically designed for LS engines with a 4.070 inch bore. While they are intended for high-performance applications, it's crucial to verify that this bore size matches your specific engine build. They are not CARB approved and cannot be shipped to California.

JE Pistons Forged Piston Set 311995 - LS Engines

Name: JE Pistons LS ASYM FT 4.100STRK Set of 8 Pistons
Brand: JE Pistons
SKU: je-pistons-je-pistons-ls-asym-ft-4-100strk-set-of-8-pistons-t14-296226
Price: 975.74 USD
Availability: BackOrder

JE Pistons LS ASYM FT 4.100STRK 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 FT 4.100STRK Set of 8 Pistons. Forged in the USA from 2618 aluminum for high-demand LS engine builds.

Key Features

Fits LS engines with a 4.070 inch bore.
Set includes 8 forged pistons.
Constructed from 2618 aluminum for high tensile strength in performance applications.
Features JE Pistons' proprietary Forged Side Relief (FSR) design to minimize friction and power loss.
Includes a shorter wrist pin for additional weight savings.
May include an accumulator groove to reduce ring flutter and improve ring seal.

This piston set is designed for LS engines with a 4.070 inch bore. It is not CARB approved and cannot be shipped to California.

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Product Details

If you're building a high-performance LS engine, you need pistons that can handle the stress. This set of eight ASYM FT pistons from JE Pistons is forged in the USA using 2618 aluminum, a material known for its high tensile strength, making it ideal for demanding performance applications. These aren't just generic pistons; JE Pistons applies over 75 years of experience to design each piston specifically for the intended engine and use, ensuring an optimized combination of durability and performance.

The design includes a proprietary Forged Side Relief (FSR) forging, which helps minimize friction and power loss by reducing skirt width. This design also saves weight with a shorter wrist pin. Depending on the specific application, these pistons may also feature an accumulator groove to reduce combustion gas pressure, which helps prevent ring flutter and improves ring seal for consistent power delivery. Some applications also include a skirt coating that further reduces friction and wear on the piston skirts and cylinder walls, while also helping to quiet down engine noise.

This set is designed for a 4.070 inch bore and features flat-top pistons with a -5.00 cc dish. Remember, these pistons are not CARB approved and cannot be shipped to California. For serious LS engine builds, these pistons offer a well-built foundation for power and reliability.