ProX Steel Plate Set WR450F 05-15 ProX clutch steel and alloy plates are manufactured by the leading OEM factories, mainly in Japan. All plates are made to exact OEM specifications and offer maximum...

ProX Piston Kit YZ450F 18-19 + YZ450FX 19-20 (96.96mm) ProX pistons are precision machined on the latest, state of the art CNC equipment. The same low-expansion, low-friction piston alloy is used as...

ProX Throttle Cable YZ450F 18-22 + WR450F 19-23 Clutch and Throttle Cables: A complete new program has been added to the already wide program of ProX Racing Parts products.

Vertex Top End Kit 4T Yamaha YZ450F 18-19/WR450F 19-20 (96.95) Forged pistons are forged from 2618 aluminum for superior strength and durability Forged high

ProX Titanium Intake Valve YZ450F 14-19 + WR450F 16-19 ProX offers a complete range of high quality Titanium Valves for MX and ATV segment. The ProX Titanium Valves are forged in one piece for extra...

ProX Titanium Exhaust Valve YZ450F 14-19 + WR450F 16-19 ProX offers a complete range of high quality Titanium Valves for MX and ATV segment.The ProX Titanium Valves are forged in one piece for extra...