KB PERFORMANCE Piston Kit - Evolution KB305.030

If you're pushing your engine to the limit, piston quality directly impacts reliability, ring seal, and longevity under sustained high-RPM operation. KB Performance's Evolution KB305.030 kit delivers diamond-machined precision and tight tolerances that reduce piston rock and prevent blowby—critical advantages when every fraction of a second counts. Built from T-5 heat-treated 390 hypereutectic aluminum, these pistons handle thermal stress while maintaining dimensional consistency across the entire kit.

Technical Specifications:

• Material: T-5 heat-treated 390 hypereutectic aluminum
• Weight tolerance: ±1 gram
• Dimensional tolerance: ±0.0005 inches
• Machining: Diamond-machined
• Ring type: Hastings moly rings
• Kit contents: Two pistons
• Includes: Piston pins, spiral-lock clips
• Installation: Bolt-on (engine-dependent)
• Fitment: Vehicle-specific—verify application
• Allows: Tighter piston-to-cylinder fit
• Benefit: Reduced piston rock
• Benefit: Superior ring seal
• Special note: Follow included instructions for top ring end gap and piston clearance specifications
• Replacement rings: Available separately
• Manufacturer: KB Performance
• MPN: KB305.030