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The JE Pistons 398729 piston kit is engineered for high-performance applications, featuring a forged 2618-T6 construction that ensures superior grain flow alignment and increased tensile strength for enhanced durability under demanding conditions. This construction choice makes it ideal for race cars and high-output engines that require reliable performance under stress. The kit includes two pistons, premium ring packs, wrist pins, and wire locks, providing everything needed for a complete rebuild or upgrade.
JE Pistons' innovative design incorporates a skirt coating that reduces operating friction and minimizes wear, extending the lifespan of the pistons and maintaining optimal engine efficiency. Offset pins are utilized to reduce piston rock and operating noise, contributing to quieter engine operation and improved stability. The pistons feature skirt notches designed for optimal clearance at bottom dead center, ensuring proper movement and reducing the risk of contact with the cylinder walls. An accumulator groove is incorporated to tap into combustion gases below the top ring, promoting a more consistent and positive ring seal, which enhances overall engine performance and efficiency.
Manufactured in the USA, these pistons are built to high standards of quality and precision. They are suitable for engines with a 4.125-inch bore and 4.375-inch stroke, with a compression ratio of 11.5:1. Whether you're building a high-performance street engine or a race-ready powerplant, this piston kit offers durability, precision, and performance, making it a reliable choice for serious enthusiasts and professional engine builders alike.
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