CORSA Performance Xtreme Valved Cat-Back Exhaust The CORSA Performance 21326CFBLK is an Xtreme Valved 3.0-inch cat-back exhaust for the 2020–2025 Cadillac CT5-V with the 3.0L engine and factory Active Valve Exhaust. This configuration features 4.5-inch twin tips in a black carbon-fiber finish. The f