CTS Turbo 3.5" High-Flow CAT BMW N55 (Pneumatic Wastegate)

The CTS Turbo 3.5" high-flow catalytic converter is purpose-built for BMW N55 engines equipped with pneumatic wastegate turbos, fitting F-series M135i and 335i models from 2012-2013. This larger-diameter cat dramatically reduces exhaust backpressure compared to the restrictive factory unit, improving turbo efficiency and throttle response. Constructed with a high-cell-count metallic substrate, it maintains emissions compliance while flowing significantly better. Direct bolt-in replacement requiring no modifications, ideal for tuned N55 platforms seeking greater performance potential without sacrificing catalytic function.