Grenade air filters are power air filters. Filtering is done through a paper mesh, just like motorcycle sport air filters. The advantage: A better filter effect than with conventional foam filters at approximately the same air flow rate. The whole also in a very nice look in different colors. Suitable for 42mm carburetor connection. Please measure beforehand! An air filter with angled connection with mounting clamp is supplied. The race-ready air flow requires an adjustment of the main jet. We recommend an increase of about 7-10%.AI-translation