ProX Yamaha YZ450F YZF450 2003-2009 Steel Intake Valve & Spring Upgrade Kit

ProX Steel Intake Valve Upgrade Kit (28.SIS2424-2)

Bike Fitment:

• Yamaha YZ 450F 2003
• Yamaha YZ 450F 2004
• Yamaha YZ 450F 2005
• Yamaha YZ 450F 2006
• Yamaha YZ 450F 2007
• Yamaha YZ 450F 2008
• Yamaha YZ 450F 2009

Specifications:

• This ProX kit includes steel valves for increased durability and less wear under extreme conditions.
• Nitrided valves offer high microhardness while a super smooth finish reduces friction between stem and guide.
• The valves are accompanied by stronger valve springs that deal with the extra weight of the steel valves.
• Springs are made from premium Chrome Vanadium Steel for high performance and durability under high RPM.
• Fully compatible with OEM retainers, bases and seals without the need of any further engine modifications.
• Comes as a complete package for quick, easy and cost effective solution.