What specific engine configurations are these pistons designed for?

These pistons are designed for Small Block Chevy (SBC) engines with a 4.040 inch bore. They are flat-top pistons with a 1.125 inch compression distance and a 0.927 inch wrist pin. Always verify compatibility with your specific engine build.

What benefits does the Forged Side Relief (FSR) design offer?

The FSR design minimizes friction and power loss by using a reduced skirt width and a shorter wrist pin. This also helps to save additional weight on the piston assembly.

Are any special coatings or grooves included on these pistons?

Depending on the specific application, these pistons may include an accumulator groove to help reduce combustion gas pressure and improve ring seal. Some applications also feature a skirt coating to reduce friction and wear, and to lower operating noise.

JE Pistons 4.040 SBC FT Piston Set 181913

Name: JE Pistons 4.040 SBC FT Set of 8 Pistons
Brand: JE Pistons
SKU: je-pistons-je-pistons-4-040-sbc-ft-set-of-8-pistons-t14-295243
Price: 1001.43 USD
Availability: BackOrder

JE Pistons 4.040 SBC FT 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 4.040 SBC FT Set of 8 Pistons. Forged in the USA from 2618 aluminum for high-demand performance.

Key Features

This is a set of 8 forged pistons for a 4.040 inch bore Small Block Chevy engine.
Constructed from 2618 aluminum, providing high tensile strength for performance applications.
Features a proprietary Forged Side Relief (FSR) design for reduced skirt width and weight savings.
Includes a 1.125 inch compression distance and a 0.927 inch wrist pin.
Designed specifically for each engine and use application for optimized performance and durability.
Made 100% in the USA.

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Product Details

This is a set of eight JE Pistons, specifically designed for a 4.040 inch bore Small Block Chevy (SBC) engine. You get flat-top pistons, each with a 1.125 inch compression distance and a 0.927 inch wrist pin. These are built for high-demand performance applications, forged in the USA from 2618 aluminum, which gives them the strong tensile strength needed for serious engine builds.

JE Pistons has been making performance pistons for over 75 years, and they've put that experience into this set. They feature a proprietary Forged Side Relief (FSR) design, which means the piston skirts are narrower and shorter, reducing friction and saving weight. Depending on the specific application, these pistons might 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 that further cuts down on friction and wear, while also making the engine run a bit quieter.

Because these pistons are designed specifically for the engine and the type of use they'll see, you can expect optimized performance and durability. They are made 100% in the USA, ensuring a high level of manufacturing control. Please note that these pistons are not CARB approved and cannot be shipped to California.