Borla 20-23 Chevy Corvette 6.2L V8 AT w/o NPP 3in ATAK Catback Exhaust - Black Chrome TipsBorla 20 23 Chevy Corvette 6. 2L V8 AT w o NPP 3in ATAK Catback Exhaust Black Chrome Tips Developing systems for the C8 Corvette presented BORLA(r) 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 140841BC includes AFM valves but does NOT include NPP dual mode exhaust valves. It features the ATAK(r) sound level, our