They drop there front diff down at a wierd angle. Judging by what I've read on their website about the install instructions it looks like they drop one side 4.5" but the other side is dropped a lot less. The reason I say this is that the passenger side uses a common size cv spacer at about 1.5" but the driver side is like 3 1/4". I've heard from quite a few people that this tends to eat the seals on the front diff. I would look into another kit since the price is comparable to other kits out there.