Fitment Information Cadillac CT6 Sedan 2.0T 3.0T Only (2016, 2017, 2018, 2019, 2020)   Specs & Features   100% T-304 stainless steel with TIG welding Mandrel Bend Piping Direct Bolt on Exhaust using stock Exhaust Mounting Point Top Speed Pro 1 has been known for its popular exhaust systems due to the unique sound, excellent fitment, high performance and awesome looks.  These exhaust systems are designed to provide the smoothest exhaust flow from their enlarged mandrel bend piping which increases horsepower and torque.  Each exhaust features a unique Top Speed muffler to provide a distinct modified sound and quality flanges and hangers for great fitment.