CTS Turbo 4" High-Flow CAT for BMW N20 4-cylinder (2012-2017) F20-F21-F22-F30-F32-F36

The CTS Turbo 4-inch high-flow catalytic converter replaces the restrictive factory unit on BMW N20 turbocharged 4-cylinder engines fitted to 2011-2016 F-series models including 228i, 328i and 528i variants. Engineered with larger substrate cells, this performance catalytic converter significantly reduces backpressure throughout the rev range while maintaining emissions compliance. The larger diameter housing improves exhaust flow efficiency, particularly benefiting tuned N20 engines where factory catalytic converters become a measurable bottleneck. CNC-machined flanges and precision mandrel bends ensure proper fitment to OEM and aftermarket downpipes. Ideal for dealer workshops building reliable performance packages on N20-powered BMWs.