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 for high-demand performance applications.

What is the Forged Side Relief (FSR) design?

The FSR design is a proprietary forging from JE Pistons. It helps minimize friction and power loss by reducing the piston skirt width and using a shorter wrist pin, which also saves weight.

Are these pistons compatible with all LS engines?

This set is designed for LS engines with a 4.000 inch bore. While they are specific to the LS platform, you should always confirm the bore size and other specifications match your particular engine build.

JE Pistons Forged Piston Set 311961

Name: JE Pistons LS ASYM FT Set of 8 Pistons
Brand: JE Pistons
SKU: je-pistons-je-pistons-ls-asym-ft-set-of-8-pistons-t14-296201
Price: 975.74 USD
Availability: BackOrder

JE Pistons LS ASYM FT 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 Set of 8 Pistons. Forged from 2618 aluminum for high-demand LS engine builds.

Key Features

Fits 8-cylinder LS engines with a 4.000 inch bore.
Set includes eight asymmetric forged pistons.
Constructed from 2618 aluminum for high tensile strength in demanding applications.
Features a proprietary Forged Side Relief (FSR) design to minimize friction and power loss.
Includes a 0.927 inch wrist pin and a 1.304 inch compression distance.
Pistons are forged and machined 100% in the USA.

This piston set is designed for 8-cylinder LS engines with a 4.000 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, getting the right pistons is crucial for durability and power. This set of eight asymmetric forged pistons from JE Pistons is designed to handle the demands of serious performance applications. 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 has over 75 years of experience, and they've put that knowledge into these specific pistons for LS engines. 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 saves weight. Depending on the specific application, you might also find an accumulator groove to help control combustion gas pressure, leading to better ring seal and consistent power. Some applications also include a skirt coating to further reduce friction and wear on the piston skirts and cylinder walls, which can also help quiet down the engine's operation.

This set is designed specifically for the LS engine, ensuring optimized performance and durability. It's important to note that these pistons are not CARB approved and cannot be shipped to California. If you're looking for a well-built set of pistons for your LS build, these are a solid option.