I had an alignment and week later had a Safe-t-plus put on. I mentioned this before but after meeting Earl near Salton Sea, my wife and I hit high winds in the San Gregorian Pass and I passed a DP who got whipped hard to the side. It was not fun but the Safe-t-plus bar helped alot. The bar uses a rear bolt on a bracket (left side / passenger side) which you need a impact wrench which was mentioned above. The others just a torque wrench.