Supersprint BMW F20 1 Series, F21 1 Series, F22 2 Series, F23 2 Series & more Stainless Steel Front Metallic Catalytic Converter(Replaces Secondary Catalytic Converter) 340i (F30/F31/F34)(S) The Cobra lowering springs help

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Supersprint BMW F20 1 Series, F21 1 Series, F22 2 Series, F23 2 Series & more Stainless Steel Front Metallic Catalytic Converter(Replaces Secondary Catalytic Converter) 340i (F30/F31/F34)(S) The Cobra lowering springs helpThe Supersprint Front Metallic Catalytic Converter(Replaces Secondary Catalytic Converter) is a precision, direct fit stainless steel upgrade engineered for the BMW F20 1 Series, F21 1 Series, F22 2 Series, F23 2 Series & more. It replaces the restrictive factory component to free up exhaust flow, sharpen throttle response and give your BMW a deeper, more purposeful note. Supersprint has been handcrafting performance exhausts in Mantova, Italy since