JE Pistons SBC 400 FSR DOME Set of 8 Pistons

This is a set of eight JE Pistons, specifically designed for a Small Block Chevy (SBC) 400 engine with a 4.145-inch bore. You'll receive the pistons themselves, ready for installation into your performance build. These aren't just any pistons; they're forged from 2618 aluminum, a material chosen for its high tensile strength, which is crucial for engines pushed to their limits. JE Pistons has been in the forged piston game for over 75 years, and they engineer and machine these right here in the USA.

What sets these apart is the FSR (Forged Side Relief) forging design. This unique approach helps minimize friction and power loss by using a reduced skirt width. They also save a bit of weight with a shorter wrist pin. Depending on the specific application, these pistons might also feature an accumulator groove to help manage combustion gas 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 piston skirts and cylinder walls, while also helping to quiet things down. Because they're designed specifically for the engine and its intended use, you get optimized performance and durability.

Since these are performance pistons for a high-demand application, it's important to note they are not CARB approved and cannot be shipped to California. Make sure you have the correct supporting components for a high-performance engine build, as these pistons are built to handle significant stress and output.