What material are these JE Pistons made from?

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

What is the purpose of the accumulator groove and skirt coating?

The accumulator groove can help reduce combustion gas pressure, improving ring seal and reducing ring flutter. The skirt coating, if included for your application, reduces friction and wear on the piston skirts and cylinder walls, which can also lower operating noise.

Are these pistons legal for use in California?

No, these pistons are not CARB approved and cannot be shipped to California due to emissions regulations.

JE Pistons 440 MOPAR .375 Dome Piston Set 213684

Name: JE Pistons 440 MOPAR .375 DOME Set of 8 Pistons
Brand: JE Pistons
SKU: je-pistons-je-pistons-440-mopar-375-dome-set-of-8-pistons-t14-295462
Price: 1129.82 USD
Availability: BackOrder

JE Pistons 440 MOPAR .375 DOME Set of 8 Pistons

$1129.82

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, known for forged racing pistons, offers this Mopar 440 Big Block .375 dome piston set. Forged in the USA from 2618 aluminum for high-demand performance.

Key Features

Fits Mopar Big Block 440 engines.
Set includes eight pistons with a .375 dome.
Forged in the USA from 2618 aluminum for high tensile strength.
Features proprietary Forged Side Relief (FSR) design for reduced friction and weight.
May include accumulator groove for improved ring seal and reduced ring flutter.
May include skirt coating to reduce friction, wear, and noise.

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Product Details

JE Pistons has been a leader in forged racing pistons for over 75 years, and they apply that experience to their domestic engine components. This set of eight pistons is specifically made for Mopar 440 Big Block engines, featuring a .375 dome to help achieve your desired compression ratio. They are forged in the USA from 2618 aluminum, a material chosen for its high tensile strength, which is crucial for engines built for high-demand performance applications.

These pistons incorporate JE Pistons' proprietary Forged Side Relief (FSR) design. This means they have reduced skirt width to minimize friction and power loss, and a shorter wrist pin to save additional weight. Depending on the specific application, these pistons may also include an accumulator groove to help reduce combustion gas pressure, which can prevent ring flutter and improve ring seal for more consistent power delivery. Some applications also feature a skirt coating designed to reduce friction and wear on the piston skirts and cylinder walls, which can also lead to quieter operation.

This piston set is designed for a 4.350 inch bore and includes pistons with a dome shape. They are manufactured 100% in the USA, ensuring a high level of quality control throughout the forging and machining process. Please note that these pistons are not CARB approved and cannot be shipped to California.