What material are these pistons made from and why is it important?

These pistons are forged from 2618 aluminum. This material is chosen for its high tensile strength, which is essential for handling the extreme pressures and temperatures found in high-performance LS engines.

What is the benefit of the FSR design and skirt coating?

The FSR (Forged Side Relief) design helps reduce friction and power loss by using a shorter skirt. The skirt coating, if included for your specific application, further reduces friction and wear on the cylinder walls, while also helping to quiet down engine noise.

Are these pistons compatible with all LS engine blocks?

This set is designed for LS engines with a 4.125 inch bore. While JE Pistons aims for specific engine applications, it's always best to confirm the bore size and other critical dimensions against your engine block specifications before installation.

JE Pistons Forged Piston Set 311998 - 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-t14-296227
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 performance.

Key Features

Fits LS engines with a 4.125 inch bore.
Set includes 8 forged pistons.
Constructed from 2618 aluminum for high tensile strength.
Features JE Pistons' Proprietary Forged Side Relief (FSR) design to minimize friction and power loss.
Includes a 0.927 inch wrist pin.
Flat top piston design with a -5.00 cc dish.

This piston set is designed for LS engines with a 4.125 inch bore. Please verify compatibility with your specific engine build before purchase.

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Product Details

JE Pistons has been a leader in forged racing pistons for over 75 years, and they've put that experience into their LS ASYM FT 4.100STRK piston set. These aren't just any pistons; they're built specifically for high-demand performance applications, ensuring your LS engine gets the durability and power it needs. Whether you're hitting the drag strip or building a serious street machine, JE Pistons are proven performers.

What sets these pistons apart is their construction and design. They're forged in the USA from 2618 aluminum, a material chosen for its high tensile strength, which is crucial for handling the stresses of a performance engine. JE Pistons also incorporates features like their Proprietary Forged Side Relief (FSR) design, which helps minimize friction and power loss by reducing skirt width and saving weight. Depending on the specific application, you might also find an accumulator groove to improve ring seal and a skirt coating to reduce friction, wear, and noise. Every aspect is considered to optimize performance and longevity.

This set includes eight pistons, each designed for a 4.125-inch bore with a flat-top configuration and a -5.00 cc dish. The included wrist pin is 0.927 inches. It's important to note that these pistons are not CARB approved and cannot be shipped to California. For serious LS engine builds, these JE Pistons offer a well-built foundation for power and reliability.