I did not change my p-valve. I did need to punch new wheel studs into the axles, the aluminum aftermarket wheels are too thick. Make sure you have a small diameter grinding device, like a dremel, or drill with a grinding stone. Also a stripping disk, or some plan to remove the corrosion and build up that accumulates on the tube. That corrosion prevents the backing plates from seating. Some anti-seize to prevent future rust. Have a plan for e brake cables. I ended up without parking brake because of piss poor planning, I hear the kj cables work. Find a good write up. The job is easy overall.