I was able to fit a full set of RZR 800 shocks in my Z6 53". I think they are a far better shock, progressive, and easy to find. They are about an 1 1/2" longer and the lower bushing spacers are a little bit longer too. You can just grind/ file them to match the OEM ones. The fronts went in easy with only having to rotate a brake line to make room for the larger springs. The rears will fit also but I discovered a design flaw with the rear diff. The diff sits too low and makes the cv axle bottom out when you try to move the a arms down for a longer shock. This does happen with the OEM shocks too, but not as bad. Check the in and out play on the axle when it is down on the ground. Now jack it up with the tire off the ground. You will see what I mean. The play is gone and the diff bearings are side loaded. To get the rears in, I unbolted the upper spindle bolt allowing the arms to go down a little bit. I then was able to attach the bottom of the shock and compress it to get the upper spindle bolt back in. I think I will have to raise the diff up to get it to work like it should have from the start. I think even with the OEM shocks in there and it binding like it is, I would have bad diff bearings at some point. I will post what I end up doing to fix this.