Aramox Exhaust Muffler, Half Moon Banana Exhaust Muffler Pipe Fit for 2 Stroke 49cc 60cc 66cc 80cc Engines Moto

Massively improves airflow compared to the included muffler you get with bicycle engine kits. Please note that this is an expansion chamber only, to call it a " muffler" is misleading as it has absolutely no baffling to reduce noise. Hilariously, it's louder than running no exhaust, however I should note that this is typical of an expansion exhaust that is actually doing its job.Your neighbors will hate you, but your bike will love it. The absolute most cost effective performance improvement you can make to your bike, alongside a reed valve and a flat slide carb.