For JK owners that have- dropped trackbar brackets, OR that have issues w/ misaligned axles, OR that have diff/ trackbar clearance issues, Poly may have the solution. (RE lift owners may have one or more of these concerns, as the RE 4 1/2" kit uses an adjustable front tb but retains the stock rear tb). I purchased the Poly rear ADJUSTABLE track bar last week and couldnt be happier. As usual, the design and fit was dead-on...stronger than stock...no more trackbar hitting the rear (Solid) diff cover...and now able to re-center the axles. Dave and Garrett at Poly are obviously and continually dedicated to customer service as well. BTW....abused the hell out of it on the trail ( along w/ the Poly tierod up front) and no issues, no squeaks, just awesome performance.