The PROX 28.4355-1 Titanium Exhaust Valve is manufactured to OEM specifications for dependable fitment and performance in select Kawasaki motocross and cross-country applications. This replacement valve is designed for the exhaust side of the cylinder head and is compatible with the 2025 and 2026 Kawasaki KX250F and KX250X.
Built as a direct replacement component, the PROX Titanium Exhaust Valve supports proper engine operation and helps restore reliable valve-train function during an engine rebuild or top-end service. Its OEM-specification manufacturing provides consistent compatibility with the original equipment configuration, making it a practical choice for maintenance and replacement applications.
Fitment: 2025 Kawasaki KX250F, 2025 Kawasaki KX250X, 2026 Kawasaki KX250F, and 2026 Kawasaki KX250X. The PROX manufacturer part number and vendor part number are both 28.4355-1. This valve is sold individually.
Features:
- Material: Titanium construction for the exhaust valve application
- Manufacturing Standard: Manufactured to OEM specifications
- Fitment: Fits 2025 Kawasaki KX250F and KX250X models
- Fitment: Fits 2026 Kawasaki KX250F and KX250X models
- Quantity: Sold individually
- Brand: PROX
- Manufacturer Part Number: 28.4355-1
- Vendor Part Number: 28.4355-1
Fitment:
2025 Kawasaki KX250F
2025 Kawasaki KX250X
2026 Kawasaki KX250F
2026 Kawasaki KX250X