These BBK Performance short performance mid pipes are specifically designed to be used with BBK CNC series long tube exhaust headers for the 2016-2023 Camaro SS - pat # 4044 or 40440 to complete installation to your factory exhaust system. These mid pipes are made from CNC mandrel bent 3-3/4 in. Tubing and feature a merged step down to allow installation to the factory exhaust system. Each BBK mid X pipe offers performance, quality and value that guarantees years of top performance for your Camaro