i believe someone got confused somewhere, osme of you are saying 89-91 and 92 bumpers are different, others are discussing the size of the holes inbetween pre89s and 89+. But as jeff said 89-92 all have the same bumper. as for pre89 having a bigger hole then 89+, the pre89 bumper's hole is about 2 inches slimmer then thee 89+, but it may or may not be taller i have no idea, i remember reading earlier somewhere that they flow about the same though.