Better still

designed to provide maximum grip in dry conditions

Even when chunks of dirt are flying

Four uniquely-positioned rear exhaust vents

Motorex - Air Filter for Yamaha YZ250F 14-18 YZ450F 14-17 WR250F 15-18 WR450F 16-18 K-Type-Loading Ramps Better stillMotorex Oil of Switzerland now offers a wide range of air filters to combine maximum filtration performance with maximum engine output! Every Motorex air filter consists of 2 layers of foam with different porosity, flame laminated to weld into shape. The outer layer acts as a pre filter to keep out mud and coarse dirt. Whereas the fine pored inner cell traps even the smallest of dirt particles. Features Precisely designed to meet high performance