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 purpose of the Forged Side Relief (FSR) design?

The FSR design helps to minimize friction and power loss. It achieves this through a reduced skirt width and a shorter wrist pin, which also contributes to saving weight.

Are these pistons compatible with all GM LS engines?

This specific set is designed for GM LS1 engines with a 3.905-inch bore. While JE Pistons makes a range of products for various LS engines, you should always confirm fitment for your particular engine model and bore size.

JE Pistons Forged Piston Set 321240 - GM LS1

Name: JE Pistons GM LS1 FT 6.098 Rod 3.905in Bore -2cc Dish - Set of 8
Brand: JE Pistons
SKU: je-pistons-je-pistons-gm-ls1-ft-6-098-rod-3-905in-bore-2cc-dish-set-of-8-t14-4398897
Price: 718.98 USD
Availability: BackOrder

JE Pistons GM LS1 FT 6.098 Rod 3.905in Bore -2cc Dish - Set of 8

$718.98

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 GM LS1 FT 6.098 Rod 3.905in Bore -2cc Dish - Set of 8. Forged in the USA for high-demand performance.

Key Features

Fits GM LS1 engines.
Set includes 8 forged pistons.
3.905 inch bore size with a -2cc dish.
Features proprietary Forged Side Relief (FSR) design to minimize friction and power loss.
Made from 2618 aluminum for high tensile strength in performance applications.
Forged and machined 100% in the USA.

This piston set is designed for GM LS1 engines. Please verify compatibility with your specific engine build.

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Product Details

JE Pistons is known for making well-built forged racing pistons, with over 75 years of experience. They've applied that knowledge to this set of pistons specifically for GM LS1 engines. These aren't just off-the-shelf parts; they're engineered and forged right here in the USA using 2618 aluminum, which gives them the strong tensile strength needed for high-demand performance applications. Whether you're building a track car or a serious street machine, these pistons are designed to handle the stress.

What sets these apart is their proprietary Forged Side Relief (FSR) forging design. This design 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 that helps manage combustion gas pressure, leading to better ring seal and consistent power. 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. These pistons are made 100% in the USA, ensuring you're getting a part built with a focus on durability and optimized performance for your engine.

This set includes eight pistons, each with a 3.905-inch bore and a -2cc dish. They are designed to work with a 6.098-inch rod and feature a 0.945-inch pin. Please note that these pistons are not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation instructions for proper fitment and assembly details.