KB PERFORMANCE Piston Kit KB266.020.3

KB Performance pistons deliver the precision tolerances and superior ring seal you need for consistent power and longevity in high-performance engines. Manufactured from T-5 heat-treated 390 hypereutectic aluminum, these diamond-machined pistons maintain weight consistency within one gram across the kit—critical for balanced engine operation and reduced vibration. The tight-tolerance design allows closer piston-to-wall clearance than conventional pistons, minimizing piston rock and maximizing combustion efficiency.

• Material: T-5 hypereutectic aluminum
• Weight tolerance: ±1 gram
• Dimensional tolerance: ±0.0005"
• Finish: Diamond-machined
• Ring type: Hastings moly
• Kit contents: 2 pistons
• Includes: Pins, spiral-lock clips
• Installation: Bolt-on assembly
• Fitment: Engine-specific (verify application)
• Replacement rings: Available separately
• Special note: Requires proper top ring end gap setup per instructions