Intake steel valves kit Prox instead the titanium valves for Yamaha YZ 450 F 03-09 (3 valves + springs)

This kit has been specially designed to replace the OEM titanium valves, if you looking for a much lower cost kit. In terms of performance there is only a negligible loss of power at high revs. The kit consists of, in addition to the 2 valves in steel, special valve springs needed to counter the greater weight of the valves. 

The ProX steel valves are manufactured of premium grade steel to exact OEM specifications and tolerances. The ProX valve are made by the leading OEM factories in Japan and are a direct and cost-efficient OEM replacement.

 Steel Valve features:

Manufactured by the leading OEM factories in Japan.
Made to exact OEM specs and tolerances.
The steel valves are a direct and cost efficient OEM replacement.

 WARNING:

• Whenever replacing the valves, the valve seat must be adjusted to ensure a proper seal. 
• Enlist for this operation only to a workshop grinding with proven and appropriate experience. 
• After first use recheck the correct valve clearance. 
• Supplied without any warranty. 

Kit valves intake and exhaust  are sold separately. The price is for 1 valve and the photo is generic