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The Akrapovič Slip-On Line system is the first step in exhaust tuning. Crafted from high-grade titanium, which considerably reduces the weight in comparison to the stock system, it has been perfectly designed to fit directly onto the existing link pipes. The system increases power, provides better throttle response, and 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 maintaines the valve regulation of the NPP (Performance exhaust) system and is developed to be compatible with the car’s drive mode selector, and 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 fibre tailpipes with titanium inners, to make the Slip-On clearly recognizable as an exhaust that means business.

Cars equipped with Akrapovič exhaust systems benefit from additional performance and increased responsiveness. Significant gains in power and torque are achieved throughout the entire rpm range. All Akrapovič exhaust system measurements are made on our computer-controlled flowbenches.

The Control Kit gives the driver the option to control the Akrapovič rear exhaust valves through the Corvette C7 drive mode selector. Once a simple installation process is completed, the electronic platform will automatically drive the exhaust's rear valves based on the engine speed, gear, and selected drive mode.

The Control Kit is only mandatory for Corvette C7s without the Performance exhaust (NPP exhaust). Corvette C7s equipped with a GM Performance exhaust (NPP exhaust) do not need the Control Kit (P-HF886).

  • HP GAIN:+8.6 HP
  • TORQUE GAINS:+8.7 FT-LBS
  • WEIGHT SAVINGS: -11.7 lbs
  • NOTE: Requires 2 QTY OEM NPP Valves GM Part # 22839592
  • Includes NPP Retrofit Box




Schematic View

Performance Graph (Dyno)

Installation Instructions

Installation Instructions for NPP Control Box
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