Borla 14-18 C7 Corvette Stingray Axle-Back ATAK Exhaust 2.75in To Muffler Dual 2.0in Out 4.25in TipBorla 14 18 C7 Corvette Stingray Axle Back ATAK Exhaust 2. 75in To Muffler Dual 2. 0in Out 4. 25in Tip This system does NOT include AFM or NPP valves. It is intended for vehicles that are either NOT equipped with AFM and NPP or have the AFM and NPP disabled. System has non functioning mounts where AFM actuators can be mounted if the vehicle had them. A Check Engine Light will occur on vehicles equipped with AFM. This system features the aggressive