Description
If you’re building or rebuilding a Twin Cam engine, piston quality directly impacts reliability, longevity, and ring seal—three things that separate a weekend warrior from a competitor. KB Performance’s hypereutectic design and diamond-machined tolerances eliminate piston rock and deliver the precision fit that forced induction and high-boost applications demand. This kit gives you the thermal stability and durability needed to run tighter clearances without compromise.
What’s Included:
- Two pistons (matched pair)
- Piston pins & clips
- Hastings moly rings
Technical Specifications:
- Material: T-5 heat-treated 390 hypereutectic aluminum
- Machining tolerance: ±1 gram weight variance
- Ring groove tolerance: ±0.0005 inches
- Finish: Diamond-machined
- Ring type: Moly-coated Hastings
- Fitment: Twin Cam engines (KB409C.005 spec)
- Installation: Bolt-on (professional assembly recommended)
- Benefits: Reduced piston rock, superior ring seal
- Special note: Requires correct top ring end gap setup
- Optional: Lock rings Part #0913-0001 (4-pack)
- Ring replacement: Sold separately
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