The system increases power, provides better throttle response, improves torque, and also conjures up an amazing sound from the naturally-aspirated V8 engine. The Slip-On Line system has two valves. The system maintains the valve regulation of the NPP (performance exhaust) system and is developed to be compatible with the car’s drive mode selector. Akrapovič engineers have developed an electronic device to drive the exhaust valves for each mode—Weather, Eco, Tour, Sport, and Track—giving the driver an even greater opportunity to enjoy the sound of the Akrapovič Slip-On Line across the whole spectrum of the car’s performance. It’s topped off by four large-diameter carbon-fiber tailpipes with titanium inners, to make the Slip-On clearly recognizable as an exhaust that means business.