JE PISTONS Piston Kit - 14.5:1 - Kawasaki 391920

If you're running a high-compression build or pushing your Kawasaki engine into professional competition territory, you need pistons engineered for the abuse. JE's 14.5:1 compression kit delivers the strength and precision required to survive extreme boost levels, high RPM loads, and sustained power delivery without compromise. These are purpose-built components, not afterthoughts—backed by decades of racing pedigree and American manufacturing.

Built from 2618-T6 forged aluminum, each piston arrives ready to install with no deburring or prep work required. The internal bracing, specialized strut milling, and dedicated accumulator grooves mean less weight and more durability where it counts. Complete kit includes pins, locks, and rings—everything you need for a full piston replacement.

• Material: 2618-T6 aluminum
• Compression Ratio: 14.5:1
• Application: Kawasaki 391920
• Internal bracing
• Forged side relief
• Weight-optimized design
• Smooth dome radii
• Includes pins, locks, rings
• No prep required
• Made in U.S.A.
• Competition-rated