Dbr Derbi Superfast High Titanium 50cc O25 Original Thermal GroupThe expansion DBR Derbi Superfast High Titanium 50cc is designed to deliver maximum performance on 50cc Derbi engines. Made entirely from Japanese Titanium, this exhaust ensures extreme lightness and optimized gas resonance for 50cc racing setups. Superfast High (high mount) is engineered to improve top end power and response at high revs, while titanium allows superior heat dissipation compared to steel, maintaining consistent performance even under