[Zach]

For the spacer and the shackle lift, is it necessary to get the extended brake lines and new shocks for the rear?

 

[XVTer]

You don't have to, but if you do get longer shocks, I recommend getting longer brake lines. Longer shocks will allow for more travel than the stockers, so it really depends on what you plan on doing with your X once it's lifted

 

[Erick]

Not required, but it's such a cheap yet integral mod in the big picture of things I always offer my opinion as a strongly advised yes.