In order to install the rear shocks, you will need to do a little bit of grinding on the upper shock mounting tabs. The Icon 2.5 series shock bodies have a very robust shock body design, and this means it needs extra clearance. We used a sanding drum and an angle grinder to add a radiused relief to the right side upper shock mounting tab. This gave us just the right amount of room to fit the shock in place and provide clearance for the shock cap through the entire range of motion. We applied some paint after grinding the tab.
The left rear shock requires slightly more work than the right shock, also thanks to the DEF tank. The upper shock mounting bolt cannot be removed all the way with the DEF tank in place, so we lowered the tank enough to allow the bolt to be removed. The spare tire had to be extracted before we could lower the DEF tank.
Once the shock is removed, the inner tab will need to be ground down slightly to clear the beefy Icon 2.5 series shock cap. Just like the other side, we used a sanding drum and an angle grinder and sealed it all up with a coat of black paint after we were done.