I have yet to find a jack, with a low enough profile, to get under the liftbars. In stock ground clearance, suspension/tire size at 4.1" (IIRC), the jack would need to be just under 2" tall. I have never seen one that low. I have a set of liftbars and really like them. I made up some 2X8 spacers to set the car on first and then have enough room to get under the liftbars. The car is very solid on them.
