I just installed the 2.5" RC on my 2017 Z71 and even though the pictures showed a spacer for the top, it is actually a ring that goes in the strut. It has to be disassembled to be put in. FYI, I didn't need to add the rear blocks for the leveled look. If you want to buy the parts without the blocks, you can save a few bucks.
Sent from my SM-G930R7 using Tapatalk