I don't think the Brembos are worth the money. Z-brakes are overkill as it is. I got the fronts for free so I put them on. I already had 5 lug. And a couple weeks ago I ran into the same problem as black zenki. Rear caliper locked up so I sourced these rear Z brakes. I think with with good aggressive pads and stainless lines, they will stop as good as anything. I have all the rear E brake assembly. How did ya'll get it to work?