Description
Maintaining precise valve operation is critical to engine reliability and performance, especially in high-stress racing applications. The PROX Exhaust Valve 28.1338-1 delivers OEM-matched specifications with the manufacturing precision required to withstand repeated thermal cycles and combustion pressures. This is a direct replacement that restores your engine’s breathing efficiency and valve sealing integrity.
- Manufacturer Part Number: 28.1338-1
- OEM specification compliance
- Precision CNC-manufactured
- Standard sizing
- Exhaust valve application
- High-temperature durability
- Direct bolt-in replacement









