2011 Night Armor Xterra S 4x4 6MT
Join Date: Feb 2016
Location: South Central PA
Turns out I ordered what's essentially an Add A Leaf from General Spring. In retrospect it would had been a lot cheaper to order the Heavy Duty pack and remove a leaf if I didn't like the ride rather than buying a leaf to put in the pack afterwards.
No problem other than the head height of the bolt they supplied that goes through the pack was 3/8", not 5/16" as the one on their pack came with. I installed the leaf, then realized after I got everything together I couldn't get the pack tight with the axle because the hole in the axle isn't deep enough for a 3/8" head, grind it down and it's fine. I also found I much prefer the U-bolts from Advance Auto to the ones I got from General Spring the first time.
Notes about this were added to the first post.