They Don't... Lol it's a long story, but I had bought it stock, and took it to a small town shop to have a 5 inch installed. They had no idea wtf they were doing, and ended up installing it completely wrong. They actually put the mounting brackets on upside down, and ended up cutting my frame in order to make it fit. Because they cut the frame, the crossmember started to crack. I ended up raising so much hell, they paid me back, and threw everything they could offer at me to avoid legal damage. After it was all said and done; I took my messed up ghetto lifted expy to a 4x4 shop to get it fixed. They took me in, and welded everything back together (they even threw in some additional support) all at the cost of the other shop... So instead of having a fancy 5 inch lift; I got a ghetto rigged 3.8 inch lift to be exact lol.