If you have a powerful engine, carburetor will need plenty of air. "Open" racing air filters increase air supply for the carburetor so the cylinder filling is optimized, and this way a preformance-enhanced tuning cylinder can unleash its full potential. We carry large and small double layer racing air filters from Stage6 in round and oval shapes, the Malossi E5 and E14 filters are part of our catalogue as well. Engine tuning can be perfectly combined with optical tuning, this why we also carry many stylish custom air filters in bright colors and great designs from Str8, Tun'R, Doppler etc. Venturi-effect bell mouths bring a little bit more power.