What is the compression ratio of these pistons?

These JE Pistons are designed for an 8.5:1 compression ratio. This is a common choice for forced induction applications like superchargers or turbochargers, helping to manage boost pressure effectively.

What materials are these pistons made from?

The pistons are forged in the USA from 2618 aluminum. This material is chosen for its high tensile strength, making it well-suited for the demands of high-performance engines.

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

This set is specifically designed for 5.4L 4V Modular 8-cylinder engines with a 3.701 inch bore. It's important to verify your specific engine's requirements, and note that these are not CARB approved for California.

JE Pistons 5.4 4V Modular 8.5:1 Piston Set 314691

Name: JE Pistons 5.4 4V MODULAR 8.5:1 Set of 8 Pistons
Brand: JE Pistons
SKU: je-pistons-je-pistons-5-4-4v-modular-8-5-1-set-of-8-pistons-t14-296572
Price: 950.07 USD
Availability: BackOrder

JE Pistons 5.4 4V MODULAR 8.5:1 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 8.5:1 Set of 8 Pistons. Forged in the USA from 2618 aluminum for high-demand performance.

Key Features

Fits 5.4L 4V Modular 8-cylinder engines.
Set of 8 forged pistons with an 8.5:1 compression ratio.
Manufactured in the USA from 2618 aluminum for high tensile strength.
Features JE Pistons' proprietary Forged Side Relief (FSR) design to minimize friction and skirt wear.
Includes an inverted dome/dish design with a -34.6 cc volume.
Piston bore size is 3.701 inches with a 0.866 inch pin diameter.

This piston set is designed for 5.4L 4V Modular 8-cylinder engines. Not CARB approved and cannot ship to California.

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Product Details

If you're building or rebuilding a high-performance 5.4L 4V Modular engine, these JE Pistons are a solid choice. This set includes eight pistons designed for an 8.5:1 compression ratio, which is a common target for supercharged or turbocharged applications where you need to manage boost pressure effectively. JE Pistons has been making forged pistons for a long time, and these are made entirely in the USA from 2618 aluminum, a material known for its strength and ability to handle the stresses of performance engines.

What sets these pistons apart is their construction. They feature JE's proprietary Forged Side Relief (FSR) design, which helps reduce friction and skirt wear, contributing to better power output and longer life. Some applications also include an accumulator groove to help maintain a good seal under high combustion pressures, and a skirt coating to further cut down on friction and noise. These aren't just generic pistons; they're specifically designed for the 5.4L 4V Modular engine to optimize performance and durability.

This kit includes everything you need for an 8-cylinder engine, with a bore size of 3.701 inches and a pin diameter of 0.866 inches. Keep in mind that these pistons are not CARB approved and cannot be shipped to California. For serious engine builds, especially those involving forced induction, these JE Pistons offer a well-built foundation for reliable power.