What material are these JE 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 JE Pistons feature that uses reduced skirt width and a shorter wrist pin. This helps to minimize friction and power loss while also saving weight.

Are these pistons compatible with all LS engines?

These pistons are designed specifically for LS engines and have a 4.080 inch bore. It's always best to verify compatibility with your specific engine build and any other components you are using.

JE Pistons LS ASYM FT 4.000STRK Piston Set 311984

Name: JE Pistons LS ASYM FT 4.000STRK Set of 8 Pistons
Brand: JE Pistons
SKU: je-pistons-je-pistons-ls-asym-ft-4-000strk-set-of-8-pistons-t14-464279
Price: 975.74 USD
Availability: BackOrder

JE Pistons LS ASYM FT 4.000STRK 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 4.000STRK Set of 8 Pistons. Forged in the USA for high-demand performance applications.

Key Features

Fits LS engines with a 4.080 inch bore.
Set includes 8 forged pistons.
Proprietary Forged Side Relief (FSR) design minimizes friction and power loss.
Made from 2618 aluminum for high tensile strength in performance applications.
Forged, engineered, and machined 100% in the USA.
Flat-top piston design.

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Product Details

If you're building a high-performance LS engine, these JE Pistons ASYM FT 4.000STRK pistons are a solid choice. JE Pistons has been making forged racing pistons for over 75 years, and these are built specifically for LS engines to give you the best combination of durability and performance. They're forged and machined right here in the USA, so you know you're getting a well-built part.

These pistons use a proprietary Forged Side Relief (FSR) design. This means they have reduced skirt width and a shorter wrist pin, which helps minimize friction and power loss while also saving weight. Depending on the specific application, they might also include an accumulator groove to help reduce combustion gas pressure, leading to better ring seal and consistent power. Some applications also get a skirt coating that further reduces friction and wear on the piston skirts and cylinder walls, which can also help quiet things down a bit. They're made from 2618 aluminum, which is known for its high tensile strength, exactly what you need for demanding performance builds.

This set includes eight pistons, each with a 4.080-inch bore and a flat-top design. Keep in mind that these are not CARB approved and cannot be shipped to California. For serious LS engine builds, these pistons are a proven option that's built to perform.