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

This quick reference fitment information is provided to direct you to our catalog information and the manufacturer’s information. Consult manufacturer publication(s) and/or website(s) for specific fitment and application information and other important information. This fitment information is based upon the stock version of the motorcycle or unit referenced and any accessory added or other modification could invalidate the quick reference information provided.