TWIN AIR Powerflow Kit - 150506P Honda XR650RThe TWINAIR Power Flow kit has an aluminium cage offering maximum sealing and stiffens the filter. Aluminium cage made from a single block Filter features a thick layer of non flammable foam Guarantees a virtually total seal on the air intake Avoids the filter retracting when you accelerate Developed in collaboration with professional teams backed by Twin Air Recommended for race use