Valve kit and head springs YAMAHA YZ450F 03-09 exhaust side

Kit springs and valves by prox.

• To replace OEM valve and valve springs
• Nitrided steel valves for longer life and less wear even in extreme conditions
• Stronger springs that manage the greater weight of steel valves
• The springs are made of high quality chrome vanadium steel for greater performance and durability at high speeds
• The kit contains a set of intake or exhaust valves and a specially designed valve spring set; it can be installed using the spring plates, bases and OEM valve gaskets