With the E-Box system, Tecnigas has designed a racing exhaust system for original and 70cc sports cylinders. The resonance of the exhaust lengths are optimized for those cylinders and thus allow full power development in the state derestricted. Hand-welded system with great character, capped off with a genuine carbon silencer. The internal construction of the expansion chamber and the nice sound of the silencer mean a pleasant Deep sound make it excellent on the road. With E-certification. Thus, the exhaust is restricted in the manifold. A removal of this restriction will invalidate the general operating permit (ABE) and significant increase in performance. Overall, the Tecnigas E-Box is a very good choice for those who do not want to change the cylinder kit or want to make significant tuning alterations to achieve an increase in performance. E-certified, thus suitable on the road. ABE is issued for Peugeot & Motorhispania DR01 DR 01 The main jet of the carburettor should be changed when fitting a new system.