2008 s550 AMG rear bumper facelift
Depending on what type of look you are going for you may not need to purchase a defusser at all. The link below is from a thread that CL55 Serge posted some picture when he was doing his tail ight conversion. What he did was cut off his rear apron so that he could fit some quads, you could do the same thing or get an entirely S63/S65 new bumper with the diffuser included. Depending on if you gou aftermarket or OEM it can be very pricey. Now in regards to the S63 exhaust tips, you would need to have an exhaust should install those for you, prices vary from $100 to $500 depending on who does it and how they do it.
CLS55 Serge (apron and diffuser cut out)
https://mbworld.org/forums/3767525-post33.html
I believe this is the look that your going for that are in the attached photos right? If so, definitely a entire bumper replacement (I maybe wrong, but I would expect this to be the case).







