Just Replaced the middle section on my 1.8 8v last night. The rear silencer is separate. I used a Bosal Replacement part no. 282-155 and the back box is part no. 100-157. The Mid section cost me €108 in the local motors, and I notice the difference all ready. In saying that in replaced the rear silencer only in June of 2001, Bosal 100-157,and shook a shovel full of stuff out of it this time, before I clamped it back on. I think I will try to get a S/S rear box the next. Does any know if the internals are S/S as well as the body.