I first installed the side frame mount that came with the 2.5" Teraflex spring jack. It was a less durable mount than this axle-side version. Installation was easy and the instructions were clear. There is a noticeable improvement in roll center/handling and I believe this is because this mount is more firmly attached by the three mounting points and is higher in my opinion than the other mount. Definitely recommend.*Note. I installed an adjustable crossbar from Git-Go, so I can't comment on how well either mount will center the rear axle with a 2.5" lift and a stock crossbar.