The PROX Titanium Exhaust Valve, part number 28.2444-1, is designed as a reliable replacement component for select Yamaha four-stroke off-road motorcycles. Manufactured to OEM specifications, this valve supports proper exhaust flow, combustion sealing, and dependable engine operation during demanding riding conditions.
Fitment includes the 2014–2019 Yamaha YZ450F and the 2016–2019 Yamaha WR450F. The valve is engineered for application-specific compatibility, helping restore the intended performance and serviceability of the motorcycle’s cylinder head. Verify the model year and engine configuration before installation to ensure correct fitment.
PROX supplies this titanium exhaust valve individually for convenient replacement during cylinder head service or engine rebuilding. Its OEM-specification manufacturing makes it a suitable choice for maintenance and repair applications where precise fit and consistent function are required. Manufacturer and vendor part number: PROX 28.2444-1.
Features:
- Material: Titanium construction for the exhaust valve application
- Manufacturing standard: Manufactured to OEM specifications
- Fitment: 2014–2019 Yamaha YZ450F
- Fitment: 2016–2019 Yamaha WR450F
- Selling unit: Valve sold individually
- Brand: PROX
- Manufacturer part number: 28.2444-1
- Vendor part number: 28.2444-1
Fitment:
2014 Yamaha YZ450F
2015 Yamaha YZ450F
2016 Yamaha WR450F
2016 Yamaha YZ450F
2017 Yamaha WR450F
2017 Yamaha YZ450F
2018 Yamaha WR450F
2018 Yamaha YZ450F
2019 Yamaha WR450F
2019 Yamaha YZ450F
2020 Yamaha WR450F