JE PISTONS 0910-6859 391731 Ultra Series Piston Kit Piston Kit - 4.250" - M8

Features

• Propriety aligned grain flow forging technology for maximum tensile strength suited for high performance enviroment
• Cermic crown coating protects the piston by reducing heat transfer
• Internal and external bracing maintains optimized strength-to-weight ratio for longevity
• 3D undercrown milling in non-critical areas reduces overall weight
• Lateral gas ports and accumulator groove maintain power-producing ring seal even at high RPM and high boost
• Skirt coating reduces operating friction and wear throughout the life of piston
• Offset pin reduces piston rock and minimize engine operating noise
• Skirt notches for optimal clearance at the bottom dead center
• Kit includes two pistons, premium ring pack, wrist pins and wire locks

Specs

Part Notes

• Kit Includes:
• • 2x Ultra Series Pistons
• • 2x Wrist Pins
• • 2x Ring Sets
• • 2x Wire Locks

Fitment Disclosure