CTS Turbo 3.5" Downpipe High-Flow CAT for Mercedes-Benz M133 A45/CLA45/GLA45 AMG

The CTS Turbo 3.5-inch downpipe replaces the restrictive factory catalyst on Mercedes-Benz M133 engine variants fitted to A45, CLA45 and GLA45 AMG models from 2014 onwards. Featuring a high-flow catalytic converter, this mandrel-bent downpipe significantly reduces exhaust backpressure while maintaining emissions compliance. The larger 3.5-inch diameter design optimises turbine efficiency and exhaust gas velocity, delivering improved throttle response and top-end performance. Precision-engineered for direct fitment to W176, C117 and X156 chassis configurations, this downpipe suits workshops seeking reliable bolt-on power gains for tuned M133 applications.