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Valve outlet (steel) + spring sets Prox Alternative, where OEM titanium valves are used, as titanium valves require a very precise installation procedure. OE titanium valves are also of poor quality, while high-end -Titanium valves are very expensive. This means that titanium valves have to be replaced frequently and cause correspondingly high costs. The Prox kits contain special, stronger springs. The kits thus replace the OEM valves and springs , whereby, for example, the OEM brackets, valve seats etc. can be reused. The steel valves offer increased durability and have a service life that is 3 times longer than the OEM titanium valves. Due to the additional weight of the steel, the reinforced springs used! - Steel valves with a longer service life and less wear under extreme conditions - Nitrided valves offer high micro-hardness, while the super-smooth surface reduces the friction between the shaft and the foot Reduced torque - Springs are made of high quality chrome-vanadium steel for higher performance and durability at high speeds - No changes to the engine necessary, as OEM brackets, seals, etc. can be reused
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