KB PERFORMANCE Piston Kit KB258.020

KB Performance pistons are engineered for racers and serious engine builders who demand precision and longevity. The T-5 heat-treated 390 hypereutectic aluminum construction allows for tighter piston-to-wall clearances, reducing piston rock and improving ring seal compared to standard alternatives. With diamond-machining tolerances held to ±1 gram weight and ±0.0005" variance, you get the consistency needed for high-RPM reliability and extended piston life.

• Material: T-5 hypereutectic aluminum
• Weight tolerance: ±1 gram
• Machining tolerance: ±0.0005"
• Heat-treated: High-strength rated
• Kit includes: Two pistons
• Included components: Wrist pins
• Included components: Spiral-lock clips
• Ring type: Hastings moly
• Installation: Bolt-on ready
• Fitment: Application-specific (verify MPN)
• Clearance: Tighter fit capable
• Ring end gap: Requires careful setup
• Replacement rings: Available separately
• Replacement clips: Available separately