Getting rid of my Z4 back box. I have no idea what’s been done to it internally as I bought the car with it on but it’s pretty loud. I'm not going to sugarcoat it, it drones everywhere, at every speed in every gear… It does sound quite good though, with plenty of pops and bangs, but it was too much for me. No idea what it’s worth to someone - £75 collected? Can be picked up from Bexleyheath 
