HMF 020474606689 Performance Exhaust: Honda Ruckus Fits: 03-14 Full System Round Side mounts Mini-End-Cap End Cap EQUAL POWER: The Performance Series distributes power evenly throughout the entire RPM range. 4-6 dB INCREASE: Depending on the model, you can expect a 4-6 dB increase over stock. UNRESTRICTED CORE: The Performance Series uses a 2 1/8 non-restrictive core for maximum flow.