Porsche 991.1 GT3/3RS - Racing Valved Exhaust with Headers, 200 Cell Sports Cat, and Carbon Engine Cover (CES3)This High Performance Racing Exhaust System by CAPRISTO is designed to suit the Porsche 991 GT3 (2013 2015) and the 991. 1 GT3RS. The complete CAPRISTO high performance system is intended to be a balanced increase between power, drive ability and sound quality, without forgetting of course a substantial loss of weight. All of this is delivered while maintaining the CAPRISTObest of both worlds philosophy which provides the capability to produce an