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 and racing engines.

What is the Forged Side Relief (FSR) design?

The FSR design features a reduced skirt width and a shorter wrist pin. This construction helps to minimize friction and power loss, while also saving weight for improved engine response.

Are these pistons compatible with all BBC engines?

This set is designed for BBC engines with a 4.375 inch bore. While they are engineered for specific applications, it's always best to confirm the exact bore size and other specifications match your engine's requirements before installation.

JE Pistons BBC .555 Dome Piston Set 258269

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-t14-295741
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 for high-demand performance.

Key Features

Fits BBC engines with a 4.375 inch bore.
Set includes 8 pistons.
Forged in the USA from 2618 aluminum for high tensile strength.
Features JE Pistons' proprietary Forged Side Relief (FSR) design to minimize friction and save weight.
Includes a 0.990 inch wrist pin and a 1.520 inch compression distance.
Designed specifically for each engine and use application for optimized performance and durability.

This piston set is designed for BBC engines with a 4.375 inch bore. Please verify compatibility with your specific engine build.

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Product Details

JE Pistons is known for making strong, reliable forged pistons that have proven themselves on the race track for over 75 years. This set of BBC pistons, part number 258269, is built with that same dedication to performance and durability. They're forged and machined entirely in the USA from 2618 aluminum, a material chosen for its high tensile strength, which is crucial for engines pushed to their limits.

These pistons feature JE Pistons' proprietary Forged Side Relief (FSR) design. This means they have a reduced skirt width and a shorter wrist pin, which helps cut down on friction and saves weight. Depending on the specific engine application, these pistons might also include an accumulator groove to help manage combustion gas pressure, leading to better ring seal and more consistent power. Some applications also benefit from a skirt coating that further reduces friction and wear on the piston skirts and cylinder walls, while also helping to quiet down engine noise. Each piston is designed specifically for its intended engine and use, ensuring you get optimized performance and durability.

This set includes eight pistons, each designed for a 4.375-inch bore with a 1.520-inch compression distance and a 0.990-inch wrist pin. Please note that these pistons are not CARB approved and cannot be shipped to California. They are also subject to Prop 65 warnings.