71986PRI | ARROW EXHAUST | Kawasaki Z900 2025–26 Nichrom Pro-Race silencer with a fixed (non-removable) dB killer. 71086PRI | ARROW EXHAUST | Kawasaki Z900 2025–26 Nichrom Pro-Race silencer with a removable dB killer. Due to EU regulations, part number 71986PRI is supplied with a fixed (non-removable) dB killer. Motopoto LLP offers part number 71086PRI with a removable dB killer for the Indian market. When the dB killer is removed, this exhaust is intended for closed-circuit or racing use only.