ATHENA offers this air filter for your motocross or enduro KTM EXC, LC4, SC, SX and MAICO GP, MC, R1 in 250cc, 350cc, 400cc, 500cc, 550, 600cc, 620cc ... In short a large number of vehicle you will have understood. This air filter is identical to the original. It is exactly the same size as the one you had before. The filter is composed of 2 different types of foam. The first one is white and fluid enough to filter the biggest dust while giving an excellent air flow and the second one is black and is made to filter the finest dust so that the quality of your air is as clean as possible for your engine. We strongly advise you to oil your air filter so that it remains efficient as long as possible. A list of compatible vehicles can be found below.