Developing systems for the C8 Corvette presented BORLA engineers with unique challenges, but our team was up to the challenge. Great care was taken to ensure the integrity and function of the system as well as the vehicle itself. Part number 140839CF includes both AFM and NPP dual mode exhaust valves. It features the ATAK sound level, our most aggressive sound. It provides a more exciting driving experience without any drone. It features our Polyphonic Harmonizer and SwitchFire technology. BORLAS Polyphonic Harmonizer Technology utilizes patented units that contain pipes of different diameters and lengths to create multiple exhaust notes that harmonize to deliver a clean, rich, fullbodied sound. Completely eliminating the turbulent center intersection of a standard XPipe, BORLAS patented SwitchFire design truly blends the combustion pulses from both sides of the engine for improved performance and a custom aggressive sound. Strategically placed heat shielding is included to prevent exhaust heat damage and protect your Corvette. Features. CatBack Exhaust System. Includes AFM and NPP Valves. ATAKType Sound Level. SwitchFire Technology. Heat Shielding. 4 Carbon Fiber Tips With Bright Centers. T304 Stainless Steel ConstructionCompatibility. 20202021 Chevrolet Corvette C8 6.2L ATAKSpecifications. Exhaust Type CatBack. Exit Position Dual Split Rear. Inlet Inside Diameter 3.000 in.. Material T304 Stainless Steel. Tail Pipe Diameter 3.000 in.. Tip Diameter 4.000 in.. Tubing Diameter 3.000 in.. Country of Origin USA