so the kit that is $549 does what exactly...sorry for the dumb question when another kit comes out for $900 I am wondering which is better. I just want to beef up the halfshafts, not going for 10's here, I am planning on the wheel hop kit also $450 plus the $549 for the first kit, I am already a grand deep here...do I have to do the wheel hop kit with the $900 kit, or is that not necessary...
