What is the thickness of a stock spring spacer? I would guess they would be in the 1/4"-1/2" range and used just as a cushion so the spring isn't riding on steel. I was poking around the jeep and it looks like there is a thicker spacer on it, maybe 2". Not certain as there is still plenty of snow to lay in. I bought the jeep with a Pro Comp 4" lift installed but it looks higher than that. Although it has a TC drop, I also have drive train vibration. If its 4" with stock spacers, I'll go with a SYE/CV. If it has larger than stock spacer, I'll remove them. Running 33" tires with no immediate plans to go larger. Also though about changing the springs.