JE PISTONS Piston Kit - 12.5:1 - Kawasaki 379937

When you're pushing your Kawasaki to competition limits, stock pistons won't cut it. JE's 12.5:1 compression kit delivers the strength and reliability you need to extract maximum power without sacrificing durability. Built from 2618-T6 forged aluminum and engineered specifically for extreme applications, these pistons are trusted by professional racers who demand zero margin for error.

This complete kit arrives ready to install—no deburring, no prep work required. You get precision-engineered internals with optimized dome geometry and factory-installed pins, rings, and locks. Made in the USA with processes and materials that stand up to sustained high-RPM stress.

• 2618-T6 forged aluminum
• 12.5:1 compression ratio
• Internal and external bracing
• Smooth dome radii design
• Dedicated accumulator groove
• Forged side relief
• Includes pins and rings
• No deburring required
• Competition-grade construction
• Made in the U.S.A.
• Kawasaki fitment specific