I went with BMR because the GMPP ones were not readily available. In two months time, I changed control arms, trailing arms, struts, springs and sway bars so it's hard for me to say exactly how much change I got from the trailing arms. The factory trailing arms arms are definitely not as strong, but I think the biggest difference will be felt in the bushings. The factory trailing arms have a very thick and soft rubber bushing allowing a good amount of deflection. The BMR bars are urethane bushings and smaller.
