This exhaust can be used in combination with the original cylinder as well as with 50-80cc sport cylinders. Derbi Senda 50 SM DRD Racing 10-13 Malossi MHR Team Modular 50cc Cylinder Kit. This product is suitable for the Derbi Senda 50 SM DRD 03-04 (EBE050) [VTHSDR1HB].