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

These pistons are designed for a 4.155 inch bore. They use a 0.927 inch wrist pin.

Are these pistons suitable for a naturally aspirated engine?

Yes, these pistons are forged from 2618 aluminum and feature designs like the FSR forging and optional accumulator grooves, making them well-suited for high-demand performance applications, including naturally aspirated builds.

What does the .165 dome mean for my engine?

The .165 dome is a specific shape on the piston crown that affects the compression ratio. This dome shape is designed to work with specific cylinder heads and crankshafts to achieve a target compression ratio for your 400 SBC build.

JE Pistons 400 SBC .165 Dome Piston Set 182056

Name: JE Pistons 400 SBC .165 DOME Set of 8 Pistons
Brand: JE Pistons
SKU: je-pistons-je-pistons-400-sbc-165-dome-set-of-8-pistons-t14-295320
Price: 1052.79 USD
Availability: BackOrder

JE Pistons 400 SBC .165 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 400 SBC .165 Dome Set of 8 Pistons. Forged in the USA from 2618 aluminum for high-demand performance.

Key Features

Fits 400 SBC engines with a 4.155 inch bore.
Set includes 8 forged pistons with a .165 dome.
Forged in the USA from 2618 aluminum for high tensile strength in performance applications.
Features JE Pistons' proprietary Forged Side Relief (FSR) design to minimize friction and save weight.
May include an accumulator groove to improve ring seal and reduce fluttering.
Skirt coating (application dependent) reduces friction, wear, and operating noise.

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Product Details

JE Pistons is known for making well-built forged racing pistons, with over 75 years of experience. They've applied that knowledge to this set of pistons specifically for a 400 SBC engine. These aren't just off-the-shelf parts; they're engineered and forged right here in the USA using 2618 aluminum, which gives them the high tensile strength needed for demanding performance builds. Whether you're hitting the drag strip or building a serious street machine, JE Pistons have a proven track record.

This set features a .165 dome and is designed for a 4.155-inch bore. JE Pistons uses a proprietary Forged Side Relief (FSR) forging design. This design helps reduce friction and power loss by using a narrower skirt and a shorter wrist pin, which also saves weight. Depending on the specific application, these pistons may also include an accumulator groove to help manage combustion gas pressure, improving ring seal and keeping power consistent. Some applications also get a skirt coating, which further reduces friction and wear on the cylinder walls, leading to quieter operation and longer life.

This kit includes everything you need for an 8-cylinder engine, with pistons designed specifically for the 400 SBC application to optimize performance and durability. Remember, these pistons are not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation instructions for proper fitment and assembly details.