Bought both sides (45D2496 and 45D2497). ACDelco appears to be sourced from two different Chinese suppliers. The design details are different, the ball bearings are different (one has an oiler, the other does not, one is clogged, one has a snap ring), different screws, different bushings. I actually went back to Revain and reordered elsewhere and they ended up being identical to these. They came down to the right one, which had to be drilled out in the stabilizer link.