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Brian, Rob and I installed the RPG collar and BajaMod spacer. Installs were similar in difficulty. Had to remove the perch on both. Removed the perch, slid the perch down, put the BajaMod spacer on then pushed it back up. If you can compress the spring enough you may not need to do this but it was easier at that point. The import differences. BajaMod raised my truck 1-3/4" to 2". The RPG collar raised Brian's truck right at an inch. Rob and Brian both have pictures comparing the difference in the trucks and they will post them.