The range of "BIG EVOLUTION" air filters increases, components of fundamental importance in the preparation of a racing engine to better optimize engine carburetion.

The particular sponge guarantees a high filtering capacity that allows to trap the impurities of the air but, at the same time, allows the passage of a large airflow.

The 203.0159 filter has the "trunk-conical" shape to allow easy assembly and safe housing on the horizontal YAMAHA MINARELLI engines equipped with pwk POLINI carburetor.