KB PERFORMANCE Piston Kit KB297.000

If you're serious about engine longevity and ring seal quality, piston tolerances matter—a lot. KB Performance's diamond-machined pistons are held to plus-or-minus one gram weight and half-thousandth-inch tolerances, allowing you to run tighter clearances that reduce piston rock and maximize ring sealing. Built from T-5 heat-treated 390 hypereutectic aluminum, these pistons deliver the precision and durability that separate professional builds from the rest.

This kit includes everything needed for installation: two pistons, wrist pins, spiral-lock pin clips, and Hastings moly rings. KB pistons are engineered for tighter fitment than conventional alternatives, but proper clearance setup is critical—follow the included installation instructions carefully, especially regarding top ring end gap, to maximize thermal conductivity and component life.

• T-5 heat-treated aluminum alloy
• ±1 gram weight tolerance
• ±0.0005" piston-to-piston tolerance
• Diamond-machined construction
• Hastings moly rings included
• Spiral-lock pin clips included
• Two pistons per kit
• Tighter clearance capable
• Reduced piston rock
• Enhanced ring seal
• Replacement rings available separately
• MPN: KB297.STD