Tecnigas Silent Pro Exhaust for 50cc 4-Stroke Lance Scooters COMPATIBILITY: Lance – Cali 50 4T, Havana 50 4T SYM – Allo 50 4T, Jet 4 50 4T High-torque 4 stroke exhaust by Tecnigas for 50cc Sym Allo and Jet 4 scooters. For those who want a new silencer and want more power but do not want to ride with a small and particularly noisy, sporty sounding exhaust on their scooter then the Tecnigas Silent Pro is a perfect match. Very good torque curve and excellent performance on 50cc and 70cc sport cylinders. Subtle design with low noise level. No E-certificate on this exhaust. Exhaust will be supplied restricted. **