ProX Intake Valve & Spring Kit – Yamaha YFZ450 / YFZ450R/X / WR450F / YZ450F | Gas Gas EC 450F

🛠️ Description
Increase reliability and performance with the ProX Intake Valve & Spring Kit. Designed as a direct replacement for OEM components, this kit includes nitrided steel intake valves and premium chrome vanadium valve springs for superior durability under extreme conditions. Built for Yamaha sport quads, off-road bikes, and Gas Gas EC 450F models, the ProX kit provides excellent high-RPM control while maintaining OEM compatibility for easy installation.

✅ What’s Included

• Set of steel intake valves

• Set of intake valve springs

📦 Fitment

• 2009–2023 Yamaha YFZ450R / SE

• 2007–2008 Yamaha YFZ450 SE

• 2006–2007 Yamaha YFZ450 Bill Balance Edition

• 2006 Yamaha YFZ450 SE 4x2

• 2004–2009 Yamaha YFZ450 / YFZ450 X 4x2

• 2004–2005 Yamaha YFZ450 LE 4x2

• 2003–2015 Yamaha WR450F

• 2003–2009 Yamaha YZ450F

• 2013–2015 Gas Gas EC 450F

🛡️ Warranty Info
ProX valve kits include a limited manufacturer’s warranty against defects in materials and workmanship. Warranty does not cover race damage, improper installation, or poor maintenance.

🔑 Key Features

• Direct OEM replacement intake valves and springs

• Nitrided steel valves for reduced wear and increased service life

• Chrome vanadium springs engineered for high-RPM durability

• Designed to work with OEM retainers, bases, and valve seals

• Improved reliability under racing and high-load conditions