Tecnigas GP4 Exhaust for 50cc 4-Stroke Lance Scooters COMPATIBILITY: Lance – Cali 50 4T, Havana 50 4T SYM – Allo 50 4T, Jet 4 50 4T Nickel plated steel exhaust system from Technigas. Specifically designed with the GP racing look and to meet the requirements of 50cc 4 stroke engines, this exhaust certainly is a head turner. Not supplied with exhaust gasket so this should be purchased separately. E-marked and fully road legal. This exhaust is specially designed to fit the Sym Allo 50cc 4-stroke and Sym Jet 4 50cc 4-stroke scooters. **