I'm sure a little more info would help,like are you referring to the factory setup,filter back.or turbo back etc etc etc.I would say if its the dpf i would consider holding on to it as it'll be worth something in the fairly near future since they're only good for aprox 100,000 mi & some people must have them so it will sell,but if just the filter back ,i would switch it out & sell the aftermarket setup or just scrap it.