What material are these pistons made from?

These JE Pistons are forged from 2618 aluminum. This material is chosen for its high tensile strength, which is necessary for high-demand performance applications.

What is the Forged Side Relief (FSR) design?

The FSR design is a proprietary forging from JE Pistons that helps minimize friction and power loss. It achieves this through a reduced skirt width and a shorter wrist pin, which also saves weight.

Are these pistons compatible with all 4.6 4V Modular engines?

This set is designed specifically for 4.6 4V Modular engines with a 9.5:1 compression ratio and a 3.701-inch bore. It's always recommended to verify compatibility with your specific engine build and specifications.

JE Pistons 4.6 4V Modular 9.5:1 Piston Set 314633

Name: JE Pistons 4.6 4V MODULAR 9.5:1 Set of 8 Pistons
Brand: JE Pistons
SKU: je-pistons-je-pistons-4-6-4v-modular-9-5-1-set-of-8-pistons-t14-296517
Price: 950.07 USD
Availability: BackOrder

JE Pistons 4.6 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 4.6 4V MODULAR 9.5:1 Set of 8 Pistons. Forged in the USA from 2618 aluminum for high-demand performance.

Key Features

Fits 4.6 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 weight.
Includes an 0.866-inch pin diameter and a 1.220-inch compression distance.

⚠️ 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 in the USA from 2618 aluminum, these JE Pistons are built to handle the demands of a high-performance 4.6 4V Modular engine. With a compression ratio of 9.5:1, this set of eight pistons is designed for builders looking for a solid foundation for their engine build, whether it's for track use or serious street performance.

JE Pistons incorporates a proprietary Forged Side Relief (FSR) forging design, which helps minimize friction and power loss by using a reduced skirt width. This design also saves weight by utilizing a shorter wrist pin. Depending on the specific application, these pistons may also feature an accumulator groove to reduce combustion gas pressure, preventing ring flutter and improving ring seal for consistent power delivery. A skirt coating, if included for this application, further reduces friction and wear on the piston skirts and cylinder walls, contributing to quieter operation and longer life.

Each piston is machined to precise specifications, including a 3.701-inch bore, a 1.220-inch compression distance, and an 0.866-inch pin diameter. This set is made 100% in the USA, ensuring a well-built component ready for demanding applications. Please note that this part is not CARB approved and cannot be shipped to California.