Alfa Romeo 4C - ECE Valved Exhaust with Carbon Diffuser (CES3)This Conversion Kit includes a Capristo valved exhaust system, a full carbon rear diffusor, a full carbon cover frame, Three Laser Cut and Polished Stainless Decorative Covers Mounting Parts, and the Programmable CES 3 Control Module. The complete CAPRISTO 4C Exhaust System & Carbon Package is intended to be a balanced increase between power, drive ability and sound quality, without forgetting of course a substantial loss of weight via the included