What is the bore size and pin diameter for these pistons?

These pistons have a 4.165-inch bore and use a 0.927-inch wrist pin. The combustion chamber volume is -5.0 cc.

Are these pistons suitable for a street-driven car?

While forged from strong 2618 aluminum for high-demand performance, the skirt coating and FSR design can help reduce friction and noise, making them a viable option for performance street builds. However, they are not CARB approved and cannot be shipped to California.

What is the Forged Side Relief (FSR) design?

The FSR design is a proprietary forging from JE Pistons that minimizes friction and power loss. It achieves this through reduced skirt width and a shorter wrist pin, which also helps save weight.

JE Pistons 400 SBC Flat Top Piston Set 194340

Name: JE Pistons 400 SBC FLAT TOP Set of 8 Pistons
Brand: JE Pistons
SKU: je-pistons-je-pistons-400-sbc-flat-top-set-of-8-pistons-t14-295373
Price: 1001.43 USD
Availability: BackOrder

JE Pistons 400 SBC FLAT TOP Set of 8 Pistons

$1001.43

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 400 SBC FLAT TOP Set of 8 Pistons. Forged in the USA for high-demand performance.

Key Features

Fits 400 SBC engines with a 4.165-inch bore.
Set includes 8 flat-top pistons.
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.
Includes a -5.0 cc combustion chamber volume and a 0.927-inch pin diameter.
May include an accumulator groove to reduce combustion gas pressure and improve ring seal.

This piston set is designed for 400 small-block Chevy (SBC) engines. Please verify compatibility with your specific engine build.

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Product Details

When you're building a high-performance 400 small-block Chevy and need pistons that can handle serious power, this set from JE Pistons is a solid choice. These aren't just any pistons; they're forged from 2618 aluminum, a material known for its strength, which is crucial for engines pushed hard on the track or street.

JE Pistons has been in the game for over 75 years, and they build these right here in the USA. They use a proprietary Forged Side Relief (FSR) design that helps cut down on friction and weight by using a narrower skirt and a shorter wrist pin. Depending on your specific engine setup, these pistons might also feature an accumulator groove to help manage combustion pressure, leading to better ring seal and more consistent power. Some applications also get a skirt coating, which further reduces friction and wear on the cylinder walls, making for a quieter engine and longer life.

This set is designed specifically for the 400 SBC engine, with a 4.165-inch bore and a flat-top design that's ideal for many performance builds. Keep in mind these are not CARB approved and cannot be shipped to California. If you're aiming for serious performance and durability, these pistons are built to deliver.