Piston Kit - 4.320" - 11.25:1 CR - 114"/117" M8
The JE Pistons Piston Kit, part number 391730, is engineered for high-performance engine applications, offering exceptional durability and strength. Featuring proprietary aligned grain flow forging technology, these pistons deliver maximum tensile strength, making them ideal for demanding environments where reliable power output is essential. The ceramic crown coating helps protect the piston by reducing heat transfer, which enhances thermal stability and prolongs engine life. Internal and external bracing components are incorporated to maintain an optimal strength-to-weight ratio, promoting longevity and sustained performance under heavy loads. Additionally, 3D undercrown milling in non-critical areas reduces overall weight without compromising structural integrity, contributing to improved throttle response and acceleration.
Features:
- Proprietary aligned grain flow forging technology for maximum tensile strength
- Ceramic crown coating reduces heat transfer and enhances thermal stability
- Internal and external bracing maintains optimal strength-to-weight ratio for durability
- 3D undercrown milling reduces weight in non-critical areas for better performance
- Lateral gas ports and accumulator groove ensure consistent power-producing ring seal at high RPM and boost levels
- Tuff Skirt, a moly-based dry film skirt coating applied in-house, reduces operating friction and improves wear resistance
- Offset pin design minimizes piston rock and engine noise
- Skirt notches provide optimal clearance at bottom dead center
- Includes two pistons, premium ring pack, wrist pins, and wire locks for complete installation
US Dollars
