03-'15 for Yamaha WR450F PROX Exhaust Valve Conversion Set Ti-Steel Gas/Yam
03-'15 for Yamaha WR450F PROX Exhaust Valve Conversion Set Ti-Steel Gas/Yam

03-'15 for Yamaha WR450F PROX Exhaust Valve Conversion Set Ti-Steel Gas/Yam

PROX

$139.95

Quantity

Manufacturer: Pro X
MPN: 28.SES2424-1
Title: Steel Valves and Spring Kits
Option: Exhaust


  • An alternative where the O.E.M. application uses expensive and less durable titanium valves
  • These steel valves offer increased durability and easily extends the lifespan to 3x that of the O.E.M. titanium valves
  • Nitrided valves offer high micro-hardness while a super-smooth surface finish reduces friction between stem and guide
  • Special stronger valve springs deal with the extra weight of the steel valves
  • Springs are made from premium chrome vanadium steel for higher performance and durability under high RPM
  • Fully rebuildable with O.E.M. retainers, bases and seals without the need of any further engine modifications
  • Intake and exhaust kits complete packages for quick, easy and cost efficient replacement

Fitment Chart

YearMakeModelPositionNotes
2013-2015Gas GasEC 450F--
2009-2023YamahaYFZ 450R 4x2--
2009-2023YamahaYFZ 450R SE 4x2--
2006-2008YamahaYFZ 450 SE 4x2--
2006-2007YamahaYFZ 450 Bill Balance Edition 4x2--
2004-2009YamahaYFZ 450 X 4x2--
2004-2009YamahaYFZ 450 4x2--
2004-2005YamahaYFZ 450 LE 4x2--
2003-2015YamahaWR 450 F--
2003-2009YamahaYZ 450 F--