What is the compression ratio with these pistons?

This set is designed to achieve an 8.5:1 compression ratio. The piston dish volume is -18.2cc, which contributes to this ratio when paired with the appropriate cylinder heads and gasket thickness for your Coyote 5.0 Modular engine.

Are these pistons coated?

Depending on the specific application, these pistons may feature a skirt coating. This coating is designed to reduce friction and wear on the piston skirts and cylinder walls, potentially leading to quieter operation and improved durability.

What is the Forged Side Relief (FSR) design?

The FSR design is a proprietary JE Pistons feature that minimizes friction and power loss. It achieves this through a reduced skirt width and can also contribute to weight savings, especially when used with a shorter wrist pin.

JE Pistons 314413 Forged Piston Set - Coyote 5.0 Modular

Name: JE Pistons COYOTE 5.0 MODULAR 8.5:1 Set of 8 Pistons
Brand: JE Pistons
SKU: je-pistons-je-pistons-coyote-5-0-modular-8-5-1-set-of-8-pistons-t14-296414
Price: 950.07 USD
Availability: BackOrder

JE Pistons COYOTE 5.0 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 COYOTE 5.0 MODULAR 8.5:1 Set of 8 Pistons. Forged in the USA from 2618 aluminum for high-demand performance.

Key Features

Fits Coyote 5.0 Modular engines.
Forged in the USA using 2618 aluminum for high tensile strength.
8.5:1 compression ratio with a -18.2cc dish volume.
3.650 inch bore size.
Features proprietary Forged Side Relief (FSR) design to minimize friction and power loss.
Includes 0.866 inch wrist pins.

⚠️ 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

Built from 2618 aluminum, these JE Pistons are forged in the USA for your Coyote 5.0 Modular engine. This set is designed for an 8.5:1 compression ratio, making it a solid choice for builds aiming for a balance of power and streetability. JE Pistons brings over 75 years of experience to the table, focusing on creating pistons that can handle the demands of performance applications, whether you're on the track or just pushing your vehicle hard.

These pistons feature JE's proprietary Forged Side Relief (FSR) design, which helps minimize friction and power loss by using a reduced skirt width. This design also contributes to weight savings, especially when paired with a shorter wrist pin. Depending on the specific application, you might find an accumulator groove, which helps manage combustion gas pressure to reduce ring flutter and improve the seal for consistent power delivery. Some applications also include a skirt coating to further reduce friction and wear on the piston skirts and cylinder walls, which can also lead to quieter operation.

This set includes eight pistons, each with a 3.650-inch bore and a -18.2cc dish volume, contributing to the 8.5:1 compression ratio. The 1.174-inch compression distance and 0.866-inch wrist pin diameter are also key specifications for proper engine assembly. It's important to note that these pistons are not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation instructions for proper fitment and assembly procedures.