CTS Turbo BMW F90 M5/M5C & BMW G15/G16 M8/M8C HIGH-FLOW CATS DOWNPIPE SET

CTS Turbo's high-flow catalytic converter downpipe set replaces the restrictive factory exhaust components on F90 M5/M5C and G15/G16 M8/M8C models. Engineered to reduce backpressure through the S63 twin-turbo V8's exhaust path, this system improves throttle response and enables more effective ECU calibration. The high-flow cats maintain emissions functionality while opening up the potential for further performance tuning. Direct bolt-on design ensures proper fitment to factory mounting points and turbocharger outlets, making it an essential foundation piece for serious tuning builds on these M platforms.