Yes It's Stock Officer T-Shirt N55 Each downpipe has two O2

Each downpipe has two O2 sensor bungs so the factory BMW O2 sensors can be remounted allowing the ECU to continue to monitor the air/fuel mixture via the exhaust

BMW 3 Series• 2016-2018 F30 F31 F34 B58 340i/340iX including GT

FEATURES OF THIS VALVED EXHAUST

The inlets simply do not come off with this upgrade

Yes It's Stock Officer T-Shirt N55 Each downpipe has two O2Do you enjoy putting your engine in places they don't belong? Maybe you are an avid LS Swap enthusiast, or perhaps a 2JZ swap enthusiast? Whatever your flavor of motor swap, this shirt will be sure to put a smile on your face! Join us in representing those who enjoy the finer things in life! If cars are your passion and engine swaps are something that fascinate you, this is the shirt for you to wear! Your car enthusiast friends will love this design