E-NOX exhaust from Tecnigas is a new, long-lasting moped system. These systems are handmade from stainless steel and specifically for Enduro geared mopeds such as Derbi Senda from 2000, Aprilia RX, SX & Gilera RCR, SMT. Tecnigas E-NOX Evo comes with the latest version of black anodized muffler and develops full power between 7000 and 10,500 RPM. This exhaust is ideal for tuning 50cc and 70cc sport cylinders. Note: Because the fuel pipe runs around the expansion chamber, the supplied metal cover should be applied for safety reasons.