How fast is banshee 350 twin with bills headers and exhaust?

The Banshee 350, especially with aftermarket modifications like Bills headers and exhaust, can achieve speeds of around 70 to 80 mph, depending on factors such as tuning, rider weight, and terrain. These performance upgrades significantly improve airflow and power output, enhancing acceleration and top speed. However, exact speeds can vary based on individual setups and conditions.