What is the purpose of the Forged Side Relief (FSR) design?

The FSR design helps minimize friction and power loss by reducing the piston skirt width. It also contributes to weight savings by utilizing a shorter wrist pin.

Are these pistons compatible with all LS7 engines?

This set is specifically designed for a 4.125 inch bore. While engineered for LS7 applications, it's crucial to verify compatibility with your specific engine build and other components.

What does the -30cc inverted dome/dish mean?

The -30cc designation refers to the volume of the piston's dish or dome. An inverted dome or dish of this size is designed to achieve a specific compression ratio when paired with compatible cylinder heads and a stock or modified crankshaft.

JE Pistons LS7 Forged Piston Set 311916

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-t14-296180
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 from 2618 aluminum for high-demand performance.

Key Features

Fits 4.125 inch bore LS7 engines.
Set includes 8 forged pistons with a -30cc inverted dome/dish.
Constructed from 2618 aluminum for high tensile strength in demanding applications.
Features proprietary Forged Side Relief (FSR) design for reduced friction and weight savings.
May include accumulator grooves to improve ring seal and reduce flutter.
Skirt coating (application dependent) reduces friction and noise.

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Product Details

Forged from 2618 aluminum, these JE Pistons are built to handle the demands of high-performance LS7 engines. This material choice is key because it offers the high tensile strength needed for applications where extreme cylinder pressures and temperatures are common. JE Pistons has been making forged racing pistons for over 75 years, and they engineer and machine these sets right here in the USA, specifically for each engine and racing application to give you the best combination of durability and performance.

This set features a proprietary Forged Side Relief (FSR) forging design. This design helps minimize friction and power loss by using a reduced skirt width, and it also saves weight by incorporating a shorter wrist pin. 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. Some applications also get a skirt coating that reduces friction and wear on the piston skirts and cylinder walls, which can also lead to quieter operation.

This particular set is designed for a 4.125 inch bore and includes pistons with a -30cc inverted dome/dish. The kit comes with 8 pistons, each with a 1.115 inch compression distance and a 0.927 inch pin. Please note that these pistons are not CARB approved and cannot be shipped to California.