WSM Piston Kit - K1100 - Standard 010-821PK

When you're building or rebuilding an engine, piston quality directly impacts power output, reliability, and longevity. The WSM K1100 Piston Kit delivers OEM-equivalent construction with engineering enhancements—specifically, a MOS2 coating that actively reduces friction and heat while strengthening critical stress points. This is the foundation your engine needs to perform consistently, whether you're pushing for track times or ensuring dependable street performance.

Each kit includes everything necessary for one cylinder: piston, rings, wrist pin, and clips. The MOS2-coated skirts are engineered to expand predictably under load while dissipating heat through the piston walls—a thermal management feature that translates to measurable power gains and extended component life. The specially hardened piston tops reinforce ring grooves against the wear and stress of high-RPM operation.

• MOS2 friction-reducing coating
• Heat-dissipating skirt design
• Hardened ring groove tops
• Improved E-clip design
• Includes piston, rings, pin, clips
• One kit per cylinder
• OEM-equivalent construction
• Additional rings available separately
• Bolt-on installation ready