Rear Diffuser Replacement
 

I just bought the quad tipped rear diffuser and it’s currently getting painted, so I’m just waiting on that to install my new exhaust system. Is it possible/feasible to replace the rear diffuser without removing the wheels and the whole bumper? If not, how much would it generally cost for a shop to do it for me, and could I use the quad tipped diffuser with my single tips until I get a chance to get my new system installed?

Welcome! Whether you have a shop do the install or you do it, the rear bumper will need to be removed. You also can run your dual tip exhaust with the quad diffuser, although it might look a bit odd, until you get your quad exhaust. You can do a search on removing the rear fascia if you decide to tackle this project, most shops will charge you an hourly rate, a reputable one will have a schematic of the rear bumper removal and should be able to give you a fairly accurate quote. Good Luck!

You can do it both ways. Here are the links on how to remove it.

https://youtu.be/h22plWwhsNA

https://youtu.be/7vb6s9lDcb0

I have a lift, I did it without removing the rear tires or bumper, so if you have access to one you’re good. If not you it’ll just be annoying on the ground