I opted for the taller bar (approx 2") so that I could locate the mounting bracket closer to the passenger pillion, cover the (2) HD mounting screw holes and not have the short back rest (51534-00) interfere with the pillion on my 2004 Warrior. Including several jpegs of the installation. The bottom screw in the last photo is not functional, it just covers the hole. The mounting kit 51144-02 comes with a plastic adhesive medallion to cover the hole. It has a HD insignia and I choose not to use it!!!!!
Like other members that have done this modification I paid particular attention to the fender sheet metal and used 3/32" neoprene and closed cell foam rubber when attaching bracket. The bracket has more integrity when mounted closer to the pillion on the 2004+. The rubber pads on the bottom of the pillion will sit on top of the HD mounting bracket counteracting forces to the backrest IMHO.
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