Hey, I'm trying to plan my mods abit more in advance than I normally do to avoid any mistakes. I have an s-line 2.0tdi 140 with the single exit twin pipe exhaust. I am wanting to change my rear diffuser so I can have a custom RS4 look a like exhaust built. Does anyone know if the RS4 diffuser will fit or will I have to get the S4 or tdi 170bhp diffuser? Also how difficult is it for the company to make a twin exit exhaust? I only ask so I know in advance if this would be worth the price they'll quote before I buy anything. I have read in a previous thread that it won't fit because of 2wd and quattro but couldn't quite work out what they meant. Thanks guys.