Prox Steel CRF 450 R 07-08 Exhaust Valves
Better than stock Titanium Valves:
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Titanium is a very exotic material that requires a strict installing procedure to make it work well. The OEM Titanium valve quality in general is rather poor while high-end Titanium valves are very expensive. Titanium valves need to be replaced at a regular base resulting in many expensive rebuilds. This in particular is the case on the CRF models, due to the use of a very hard material for the OEM valve seat.
Special features on this kit:
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-21-4N Stainless Steel Valves for increased durability and less wear under extreme conditions.
-Black Nitrided valves offer high microhardness while supersmooth surface finish reduces friction between stem and guide.
-Fully rebuildable with OEM retainers, bases and seals without the need of any further engine modifications.
