Megaton X-Race homologated motorcycle silencer The simple and refined design makes it perfect for any cafe racer, scrambler, custom or special. The silencer is E3 approved and can be opened and regenerated therefore eternally. Made for Cafè Race exclusively by MASS Measurements: length 380mm diameter hole inlet manifold 45mm diameter hole gas outlet 50mm It is also possible to request the specific homologation certificate for your bike.