dbr derbi superfast low 95 120ccThe DBR Derbi Superfast Low 95 120cc expansion represents an extreme solution for Hyper Big Bore tuning on Derbi engines. Made from Ferro P04 with handcrafted workmanship, this exhaust is designed to handle very high gas volumes and non standard rotation speeds. The Superfast Low (low mount) design, combined with hand peened welding, achieves a perfectly smooth internal passage, eliminating turbulence and maximizing gas velocity. This results in an