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 where durability is critical.

What is the purpose of the Forged Side Relief (FSR) design?

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

Are these pistons compatible with all Big Block Chevrolet engines?

These pistons are designed for Big Block Chevrolet engines and are specifically sized for a 4.375 inch bore with a 1.645 inch compression distance and a 0.990 inch wrist pin. Always verify these dimensions against your engine's specifications and build plan.

JE Pistons BBC .555 Dome Piston Set 258280

Name: JE Pistons BBC .555 DOME Set of 8 Pistons
Brand: JE Pistons
SKU: je-pistons-je-pistons-bbc-555-dome-set-of-8-pistons-t14-295750
Price: 1052.79 USD
Availability: BackOrder

JE Pistons BBC .555 DOME Set of 8 Pistons

$1052.79

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 BBC .555 DOME Set of 8 Pistons. Forged in the USA from 2618 aluminum for high-demand performance.

Key Features

Fits Big Block Chevrolet (BBC) engines.
Set includes eight forged pistons.
Forged in the USA using 2618 aluminum for high tensile strength in performance applications.
Features a proprietary Forged Side Relief (FSR) design to minimize friction and power loss.
Designed specifically for each engine and use application for optimized performance and durability.
Includes a 4.375 inch bore, 1.645 inch compression distance, and 0.990 inch wrist pin.

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Product Details

When you're building a high-performance Big Block Chevrolet engine, the pistons are a critical component that needs to handle serious stress. This set of eight pistons from JE Pistons is forged from 2618 aluminum, a material chosen for its high tensile strength, making it well-suited for demanding performance applications where durability is paramount. These pistons are designed specifically for your engine and intended use, aiming for an optimal balance of performance and longevity.

JE Pistons has been a leader in forged racing pistons for over 75 years, and they engineer, forge, and machine these pistons entirely in the USA. They feature a proprietary Forged Side Relief (FSR) design, which helps minimize friction and power loss by reducing skirt width and using a shorter wrist pin, saving weight in the process. Depending on the specific application, these pistons may also include an accumulator groove to manage combustion gas pressure, reducing ring flutter and improving ring seal for consistent power delivery. Additionally, a skirt coating, if included for your application, further reduces friction and wear on the piston skirts and cylinder walls, contributing to quieter operation.

This particular set is designed for a 4.375 inch bore with a 1.645 inch compression distance and uses a 0.990 inch wrist pin. It's important to note that these pistons are not CARB approved and cannot be shipped to California. For a serious engine build, these JE Pistons offer a well-built foundation designed for performance and proven in racing environments.