I have a modded 2011 P4x with 5100s, ADO HD coils & Alcan leafs/standard OEM shackle. Great off road & daily driver. I also have a restored 1981Toyota FJ40 Land Cruiser that has leaf springs front and rear (OME 2.5" lift using leafs & shocks). My FJ40 will out-wheel my Xterra any day of the week. Putting down a leaf spring suspension is just uneducated & an error. They are 2 different types of rigs which does make a difference. As an afterthought, I had a 1974 FJ40 that I bought new back in the day and I went places that the other 4WD vehicles of the day couldn't even get to (referring to Blazer, full size trucks, etc). Don't put down leaf spring suspensions.