KB PERFORMANCE Piston Kit KB305.040

If you're serious about maximizing engine performance and longevity, piston quality is non-negotiable. The KB PERFORMANCE Piston Kit KB305.040 delivers the tight tolerances and precision engineering that separate race-grade components from off-the-shelf alternatives. Built for engines that demand reliability under extreme conditions, these pistons reduce rock, improve ring seal, and extend component life—exactly what professional racers and high-output builds require.

Key Specifications:

• 390 hypereutectic aluminum alloy
• T-5 heat-treated construction
• Diamond-machined finishing
• ±1 gram weight tolerance
• ±0.0005" piston-to-piston tolerance
• Two pistons per kit
• Includes piston pins
• Spiral-lock pin clips included
• Hastings moly rings included
• Tighter fit capability
• Reduced piston rock
• Improved ring seal
• Replacement rings available separately
• Requires careful ring end-gap setup
• Professional installation recommended

Note: Consult included instructions for correct piston clearance and ring installation specifications.