PROX STEEL EXHAUST VALVE/SPRING KITKX250F 04-12 RM-Z250 04-06 PART# 28.SES4335-1

PROX STEEL EXHAUST VALVE/SPRING KITKX250F 04-12 RM-Z250 04-06 PART# 28.SES4335-1 NEW.

• Steel valves for increased durability and less wear under extreme conditions
• Nitrided valves offer high micro hardness while 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 at high rpms
• Fully rebuild able with oem retainers bases and seals without the need of any further engine modifications
• Comes as complete package for quick easy and cost efficient replacement