With the E-Box system, Tecnigas has designed a racing exhaust system for original and 70cc sports cylinders. The length of the exhausts is optimised for those cylinders and thus allows full power performance. Hand-welded system with great character, capped off with a genuine carbon silencer. The internal construction of the expansion chamber and the subtle sound of the silencer make for a pleasant, deep sound and make it excellent on the road. With E-certification. Thus, the exhaust is restricted in the manifold. Removing the restrictor will void the road legal status, but will lead to a significant performance improvement. Overall, the Tecnigas E-Box is a very good choice for those who do not want to change the cylinder kit or for those who want to take serious tuning measures in order to achieve a substantial increase in performance. E-certified, thus suitable on the road. The general operating permit (ABE) is issued on Derbi SDR (senda R 2000 SM & R). The main jet of the carburettor should be changed when fitting a new system. Down pipe and the exhaust system may differ from the product image as this is a demo illustration.