CTS Turbo 4" High-flow CAT BMW N55 (Electric Wastegate)

The CTS Turbo 4-inch high-flow catalytic converter is purpose-built for BMW N55 turbocharged engines equipped with electric wastegate systems. Designed to replace the restrictive factory catalytic converter, this 4-inch diameter unit significantly reduces exhaust backpressure while maintaining emissions compliance. The increased internal flow capacity allows faster spool and improved exhaust gas evacuation throughout the rev range. Precision-engineered for direct fitment to F22 M135i and M235i models, plus F30 335i variants from 2013 to 2016, this CTS Turbo catalytic converter integrates seamlessly with both factory and modified exhaust systems when paired with appropriate tuning.