Description
The piston is the heart of your engine’s combustion process, and a worn or damaged unit directly compromises power delivery, fuel efficiency, and reliability. This PROX kit delivers OEM-quality components precision-machined to exact tolerances, ensuring proper ring sealing and consistent performance across the full RPM range. Whether you’re rebuilding after race-day wear or performing routine top-end maintenance, this complete kit eliminates the guesswork and gets your FE450 or 450EXC-F back to peak output.
- Bore diameter: 94.95 mm
- CNC-machined piston
- OEM-spec piston rings
- Wrist pin included
- Circlips included
- Instruction sheet included
- Fits Husqvarna FE450
- Fits KTM 450EXC-F
- MPN: 01.6440.A
- Complete top-end rebuild kit






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