KB PERFORMANCE Piston Kit KB272.005

If you're building a high-rpm engine or refreshing a tired block, piston quality directly impacts reliability and performance. KB Performance pistons are held to tolerances most manufacturers won't match—plus or minus one gram and .0005" across the entire kit—which means less piston rock, better ring seal, and measurably longer service life. These pistons allow tighter clearances than standard units, giving you the precision fit that separates a solid build from a bulletproof one.

• T-5 heat-treated 390 hypereutectic aluminum
• Diamond-machined for consistency
• ±1 gram weight tolerance
• ±.0005" bore-to-bore tolerance
• Two pistons per kit
• Includes pins and spiral-lock clips
• Hastings moly rings included
• Allows tighter piston clearance
• Reduces piston rock
• Improved ring seal performance
• Bolt-on installation
• MPN: KB272.005