PORSCHE 991.2 CARRERA TURBO Exhaust DECAT cell cat pipe setThe Porsche 991. 2 Carrera, the first Carrera to replace its naturally aspirated engine for a 3. 0 litre twin turbo. Despite producing an impressive 414hp, and 0 60 time of 4. 1 seconds (Carrera s model), the 991. 2 Carrera has been criticised for lacking exhaust noise, the essence and soul of previous Carrera models. However, here at Kline, we are experts at turning lacklustre turbo sounds, into a head turning supercar wail. Our main design brief for