Steel Exhaust Valve/Spring Kit Prox Yamaha YZ/WR 250 F 01-13 Gas Gas EC 250 F 10-14 300 F 13-14

Of Dutch origin, ProX Racing Parts started its activity in 1975. ProX currently offers more than 8,000 product references divided into 60 product groups and exporting to more than 70 countries.
ProX markets oil filters, brake pads, countershaft seal kits, air filters, seal kits, connecting rod repair kits and gasket kits among other spare parts and accessories.
We offer affordable, non-original spare parts for off-road bikes. At GreenlandMX we have non-original spare parts from a wide range of the best manufacturers with OEM quality and eligible for competition.