KB PERFORMANCE Piston Kit KB266.000.3

If you're building or rebuilding a high-performance engine, piston quality directly impacts reliability, ring seal, and overall longevity. KB Performance pistons are diamond-machined to extreme tolerances and manufactured from T-5 heat-treated 390 hypereutectic aluminum—a material engineered to withstand sustained high RPM and elevated combustion pressures. The tight fitment tolerances and superior thermal properties of these pistons mean less piston rock, better ring seal, and extended service life compared to standard alternatives.

Technical Specifications:

• Material: T-5 heat-treated 390 hypereutectic aluminum
• Weight tolerance: ±1 gram
• Machining tolerance: ±0.0005 inches
• Diamond-machined finish
• Tighter fitment than standard pistons
• Reduced piston rock
• Improved ring seal
• Kit includes: Two pistons
• Includes: Piston pins
• Includes: Spiral-lock pin clips
• Includes: Hastings moly rings
• Installation: Bolt-on
• Rings/clips: Available separately
• MPN: KB266.STD

Note: Consult included instructions for correct piston clearance and top ring end gap specifications before installation.