I also wanted to point this out. This has been quoted from an article that dislikes revolvers (Lamest 4x4 Products).

"Revolvers, or any homebuilt wacky shackle. Gawd, makes us just want to turn around if we get behind a guy running these things on the trail because of how many driveshafts we've seen bind and spit out on their behalf-especially while climbing a ledge. They unload and cause the springs to jack, sending the rear pinion toward the floor and the front toward the ground, negating any traction the tires may get. Just a bad idea all around unless all you care about is RTI ramp scores."

The same articles says this about steel bumpers.

"Bumpers made from square or rectangle tube? Just ugly. With all the manufacturing technology available today, we can't understand why anyone would want to replace a good-looking factory bumper with square stock-especially on late-model Jeeps. Buildings, trailers, and farm-animal feeders should be made from square and large-diameter round tube, not Jeep parts."

And we all know a majority of Xterra owners would not consider a steel bumper lame. There is plenty of articles out there on these shackles, just do your reading and research before making your decision.