Powerkit for Porsche 911 Carrera S Brings Back Classic Rumble Exhaust
  Powerkit And Aero Upgrades for Porsche 911 Brings Back Classic Rumble Exhaust For many Porsche 911 owners, the rumble from out back becomes one of the car’s most loved and central features. Far more than a gimmick, the 911 breathes directly from the wind ‘backflow’ at the rear of the car at high speeds. Ideally, the Carrera S Powerkit will sound much like the Sport Classic below: Like it’s own pressure chamber, the spoiler’s effectiveness is required to channel that cold air directly into this once-air-cooled engine setup. 430HP is on tap, a jump from 400. Classic 911 …