What is the compression ratio of these pistons?

These JE Pistons are designed to achieve a 9.5:1 compression ratio. This ratio is suitable for many performance applications, balancing power output with pump gas compatibility.

Are these pistons coated?

Depending on the specific application, these pistons may come with a skirt coating. This coating is designed to reduce friction and wear on the piston skirts and cylinder walls, while also helping to lower operating noise.

What does the Forged Side Relief (FSR) design do?

The proprietary Forged Side Relief (FSR) design minimizes friction and power loss. It achieves this through a reduced skirt width and can save additional weight with a shorter wrist pin.

JE Pistons 5.4 4V Modular Piston Set 314695

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-t14-296576
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 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.
Bore size is 3.622 inches.
Made in the USA from 2618 aluminum for high tensile strength.
Features proprietary Forged Side Relief (FSR) forging design to minimize friction and power loss.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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Product Details

Forged from 2618 aluminum, these JE Pistons are built for high-demand performance applications. This set is specifically designed for the 5.4L 4V Modular engine, featuring a 9.5:1 compression ratio and a 3.622-inch bore. JE Pistons brings over 75 years of experience to the table, engineering and machining these pistons entirely in the USA to ensure top-tier durability and performance for your build.

The proprietary Forged Side Relief (FSR) forging design is a notable feature, minimizing friction and power loss by reducing skirt width. This design also contributes to weight savings, especially when paired with a shorter wrist pin. Depending on the specific application, these pistons may also include an accumulator groove to help reduce combustion gas pressure, which can improve ring seal and prevent ring flutter for more consistent power delivery. A skirt coating, if included for your application, further reduces friction and wear on the piston skirts and cylinder walls, while also helping to quiet down operating noise.

This set includes eight pistons, each with a 3.622-inch bore, a 1.320-inch compression distance, and a 0.866-inch wrist pin. The dish volume is -19.9cc, contributing to the 9.5:1 compression ratio. These pistons are made 100% in the USA, ensuring you're getting a well-built component for your engine. Please note that this part is not CARB approved and cannot be shipped to California.