Description
If you’re serious about maximizing engine performance and longevity, piston quality directly impacts your results. The KB PERFORMANCE KB297.040 delivers diamond-machined precision and tight tolerances that reduce piston rock, improve ring seal, and extend component life—giving you the reliability professional racers and high-performance builders depend on. These pistons allow installation with tighter clearances than standard alternatives, translating to measurably better combustion efficiency and reduced wear.
- T-5 heat-treated aluminum
- 390 hypereutectic alloy
- Diamond-machined finish
- ±1 gram weight tolerance
- ±0.0005″ piston-to-piston tolerance
- Two pistons per kit
- Includes wrist pins
- Spiral-lock pin clips included
- Hastings moly rings included
- Tighter clearance capable
- Reduced piston rock
- Enhanced ring seal
- Extended piston life
- Rings & clips available separately
- Requires instruction adherence
- Top ring gap critical






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