Is your BMW throwing emissions related codes? While we're primarily a BMW performance parts house, we understand the importance of maintaining your emissions system to pass inspection in your area and keep your check engine light off. Pick up your emissions related parts from Turner Motorsport.
This weld-in bung allows an O2 sensor to be screwed into your exhaust system. It's required for custom exhaust systems, and is also useful for air/fuel ratio measurements when dyno testing.
