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The JE Pistons Piston Kit (Part Number 394140) is engineered with proprietary aligned grain flow forging technology, providing maximum tensile strength for demanding high-performance engine environments. This advanced manufacturing process ensures durability and reliability under extreme conditions, making it ideal for enthusiasts and professional racers alike. The kit features a ceramic crown coating that significantly reduces heat transfer, helping to maintain optimal piston temperature and prevent thermal fatigue during intense operation. This coating also enhances the piston’s resistance to wear and corrosion, extending its service life in high-stress applications. The pistons incorporate internal and external bracing that maintains an ideal strength-to-weight ratio, promoting longevity and consistent performance over time. 3D undercrown milling in non-critical areas reduces overall weight without compromising strength, resulting in improved throttle response and acceleration. Lateral gas ports and an accumulator groove ensure the maintenance of a power-producing ring seal at high RPM and boost levels, supporting maximum power output. The Tuff Skirt coating is a proprietary moly-based dry film applied in-house, which minimizes operating friction and enhances wear resistance, leading to smoother operation and reduced piston slap. An offset pin design reduces piston rock and minimizes engine noise, contributing to quieter operation and improved engine longevity. The skirt notches are precisely engineered to provide optimal clearance at bottom dead center, preventing piston slap and ensuring reliable movement within the cylinder. This comprehensive kit includes two pistons, a premium ring pack, wrist pins, and wire locks, offering a complete solution for high-performance engine builds. Designed to fit 4.320-inch bore diameters with a 10.25:1 compression ratio and compatible with 114-inch or 117-inch M8 applications, this piston kit delivers strength, durability, and performance for a wide range of high-powered engines.
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