What is the compression distance and pin size for these pistons?

These pistons have a compression distance of 1.115 inches and use a 0.927 inch wrist pin. This information is important for calculating your final compression ratio.

What is the purpose of the accumulator groove?

The accumulator groove, found on some applications, helps reduce pressure from combustion gases. This can lead to less ring fluttering and an improved ring seal, contributing to more consistent power.

Are these pistons suitable for all LS7 builds?

These pistons are designed for high-demand performance applications and are forged from 2618 aluminum. However, they are not CARB approved and cannot be shipped to California. Always confirm compatibility with your specific engine build and local regulations.

JE Pistons LS7 Piston Set 311918 - Forged Aluminum

Name: JE Pistons LS7 DISH/INVDM -30CC Set of 8 Pistons
Brand: JE Pistons
SKU: je-pistons-je-pistons-ls7-dish-invdm-30cc-set-of-8-pistons-t14-296182
Price: 975.74 USD
Availability: BackOrder

JE Pistons LS7 DISH/INVDM -30CC Set of 8 Pistons

$975.74

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 LS7 DISH/INVDM -30CC Set of 8 Pistons. Forged 2618 aluminum for high-demand performance.

Key Features

Fits LS7 engines.
Set includes 8 pistons with a 4.130 inch bore.
Forged from 2618 aluminum for high tensile strength in performance applications.
Features proprietary Forged Side Relief (FSR) design to minimize friction and power loss.
Includes an accumulator groove (application dependent) to improve ring seal.
Skirt coating (application dependent) reduces friction and wear while lowering operating noise.

This piston set is designed for LS7 engines. Please verify compatibility with your specific engine build.

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Product Details

If you're building a high-performance LS7 engine, getting the right pistons is crucial for durability and power. These JE Pistons are designed specifically for the LS7 engine, offering a robust foundation for your build. They are forged from 2618 aluminum, a material known for its high tensile strength, which is exactly what you need when pushing an engine hard.

JE Pistons brings over 75 years of experience to the table, and these pistons reflect that. They feature a proprietary Forged Side Relief (FSR) forging design that helps reduce friction and power loss by using a narrower skirt and a shorter wrist pin, saving weight in the process. Depending on the specific application, you might also find an accumulator groove, which helps manage combustion gas pressure to prevent ring flutter and improve ring seal for consistent power delivery. Some applications also include a skirt coating that further reduces friction and wear on the piston skirts and cylinder walls, while also helping to quiet down the engine operation. Every step, from engineering to machining, is done right here in the USA.

This set includes eight pistons, each with a 4.130-inch bore, a 1.115-inch compression distance, and a 0.927-inch pin. The dish/inverted dome design has a -30.00 cc volume. Please note that these pistons are not CARB approved and cannot be shipped to California.