These UMA Racing velocity stacks/air funnels look pretty nice if you are for using it for the track, allowing smooth and even entry of air at high velocities/RPM into the intake system. However using this on the street is highly risky for your engine durability. If you are looking for air filters for street use instead, use UMA racing cone/pod and Max-Flow air filters to safely filter intake air for your engine. We also have other motorcycle air filters as well.
- Fits carburetor mouth sizes: 50mm