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

The FSR design minimizes friction and power loss by reducing the piston skirt width. It also saves additional weight by utilizing a shorter wrist pin, contributing to overall engine efficiency.

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

The accumulator groove helps reduce pressure from combustion gases, which can improve ring seal and reduce ring fluttering for consistent power. The skirt coating reduces friction and wear on the piston skirts and cylinder walls, while also lowering operating noise.

Are these pistons suitable for all engine builds?

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

JE Pistons 400SBC .305 Dome Piston Set 207513

Name: JE Pistons 400SBC .305 DOME Set of 8 Pistons
Brand: JE Pistons
SKU: je-pistons-je-pistons-400sbc-305-dome-set-of-8-pistons-t14-295418
Price: 1052.79 USD
Availability: BackOrder

JE Pistons 400SBC .305 DOME 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 400SBC .305 Dome Set of 8 Pistons. Forged in the USA from 2618 aluminum for high-demand performance.

Key Features

Fits 400 SBC engine with a 4.185 inch bore.
Set includes 8 pistons with a .305 dome and 10.9 cc volume.
Forged in the USA using 2618 aluminum for high tensile strength.
Features JE Pistons' proprietary Forged Side Relief (FSR) design to minimize friction and save weight.
May include an accumulator groove to reduce combustion gas pressure and improve ring seal.
May include a skirt coating to reduce friction and wear, and lower operating noise.

This piston set is designed for the 400 SBC engine. Please verify compatibility with your specific engine build.

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Product Details

Forged in the USA using 2618 aluminum, these JE Pistons are built for high-demand performance applications. This set is specifically designed for the 400 SBC engine, featuring a .305 dome and a 4.185-inch bore. The 2618 aluminum alloy provides the high tensile strength needed to withstand the pressures of serious engine builds, ensuring durability when you push your engine hard.

JE Pistons incorporates their proprietary Forged Side Relief (FSR) forging design, which reduces skirt width to minimize friction and power loss, while also saving weight with 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 delivery. A skirt coating, also application-dependent, further reduces friction and wear on the piston skirts and cylinder walls, contributing to quieter operation and longer life.

This set includes eight pistons, each designed for optimal performance and durability in its intended application. JE Pistons has over 75 years of experience in forged racing pistons, and this set reflects that expertise, engineered and machined entirely in the USA. While these pistons are built for performance, please note they are not CARB approved and cannot be shipped to California. For serious engine builds, JE Pistons offers a proven combination of durability and performance, trusted from dirt tracks to drag strips.