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 crucial for handling the extreme pressures and temperatures found in high-performance engines.

What is the Forged Side Relief (FSR) design?

The FSR design is a proprietary feature from JE Pistons that reduces skirt width and uses a shorter wrist pin. This helps to minimize friction and power loss while also saving weight.

Are these pistons compatible with all 5.4L 4V Modular engines?

This set is designed for the 5.4L 4V Modular engine with a 9.5:1 compression ratio and a 3.562 inch bore. It's important to verify that these specifications match your engine's requirements, as variations can exist.

JE Pistons 5.4 4V Modular 9.5:1 Piston Set 314693

Name: JE Pistons 5.4 4V MODULAR 9.5:1 Set of 8 Pistons
Brand: JE Pistons
SKU: je-pistons-je-pistons-5-4-4v-modular-9-5-1-set-of-8-pistons-t14-296574
Price: 950.07 USD
Availability: BackOrder

JE Pistons 5.4 4V MODULAR 9.5:1 Set of 8 Pistons

$950.07

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 5.4 4V MODULAR 9.5:1 Set of 8 Pistons. Forged in the USA from 2618 aluminum for high-demand performance.

Key Features

Fits 5.4L 4V Modular engines.
Set includes 8 forged pistons.
Compression ratio is 9.5:1.
Forged in the USA using 2618 aluminum for high tensile strength.
Features proprietary Forged Side Relief (FSR) design to minimize friction and power loss.
Includes an accumulator groove (application dependent) to reduce ring flutter and improve ring seal.

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Product Details

JE Pistons is known for making strong, reliable forged pistons that have proven themselves in racing for over 75 years. This set of eight pistons is built for the 5.4L 4V Modular engine, offering a 9.5:1 compression ratio. They are forged and machined entirely in the USA from 2618 aluminum, a material chosen for its high tensile strength, making these pistons well-suited for high-demand performance applications where durability is key.

These pistons feature JE Pistons' proprietary Forged Side Relief (FSR) design, which helps minimize friction and power loss by using a reduced skirt width and a shorter wrist pin, saving weight in the process. Depending on the specific application, they may also include an accumulator groove to help manage combustion gas pressure, reducing ring flutter and improving ring seal for more consistent power delivery. 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 operation.

This set is designed specifically for the 5.4L 4V Modular engine to optimize both performance and durability. The bore size is 3.562 inches, with a compression distance of 1.320 inches and a pin diameter of 0.866 inches. The dish volume is -17.5 cc, contributing to the 9.5:1 compression ratio. Please note that these pistons are not CARB approved and cannot be shipped to California.