What is the compression ratio with these pistons?

These pistons are designed to achieve a 10.25:1 compression ratio in a 426 Hemi engine. This is a common target for performance builds seeking a balance between power and pump gas compatibility.

What material are these pistons made from?

The pistons are forged from 2618 aluminum. This alloy is chosen for its high tensile strength, making it suitable for high-demand performance applications where durability is critical.

Are any special coatings or grooves included?

Depending on the specific application, these pistons may feature an accumulator groove to help reduce combustion gas pressure and improve ring seal. They may also include a skirt coating to reduce friction, wear, and noise.

JE Pistons 426 HEMI DM 10.25/1 Piston Set - 131850

Name: JE Pistons 426 HEMI DM 10.25/1 Set of 8 Pistons
Brand: JE Pistons
SKU: je-pistons-je-pistons-426-hemi-dm-10-25-1-set-of-8-pistons-t14-295151
Price: 1052.79 USD
Availability: BackOrder

JE Pistons 426 HEMI DM 10.25/1 Set of 8 Pistons

$1052.79

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 426 HEMI DM 10.25/1 Set of 8 Pistons. Forged from 2618 aluminum for high-demand performance.

Key Features

Fits Chrysler 426 Hemi engines with a 4.255 inch bore.
Set includes 8 pistons with a dome top for 10.25:1 compression ratio.
Forged in the USA from 2618 aluminum for high tensile strength and durability.
Proprietary Forged Side Relief (FSR) design minimizes friction and power loss.
Features a 1.031 inch pin diameter and 1.955 inch compression distance.
May include an accumulator groove for improved ring seal and reduced fluttering.

This piston set is designed for Chrysler 426 Hemi engines. Not CARB approved and cannot ship to California.

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Product Details

If you're building a high-performance 426 Hemi engine, getting the right pistons is crucial for durability and power. This set of eight pistons from JE Pistons is designed specifically for that legendary engine, aiming to give you the best combination of strength and performance for demanding applications.

These pistons are forged in the USA from 2618 aluminum, a material known for its high tensile strength, which is exactly what you need when you're pushing an engine hard. JE Pistons uses a proprietary Forged Side Relief (FSR) design that helps reduce friction and skirt width, saving weight and potentially improving power. Depending on the specific application, these pistons might also feature an accumulator groove to help manage combustion gas pressure for better ring seal, and a skirt coating to cut down on friction, wear, and noise. They are made to fit the 4.255-inch bore with a dome top, targeting a 10.25:1 compression ratio.

This set includes everything you need for an 8-cylinder engine build. Keep in mind that these pistons are not CARB approved and cannot be shipped to California. For a serious Hemi build, these JE Pistons are a well-built option forged and machined entirely in the USA.