This is my milltek rear box for e46 m3 been on car nearly 2 years done around 12k miles. sounds amazing very light. adds performance and sports sound. for sound clips youtube it. When i removed the box there is a small hole that can be easly welded up i didnt notice it when it was on the car and it recently passed an mot so it might not even leak. just being honest. could do with a good clean.price includes postage to uk mainland only or you can collect and i will take £30 off