Be prepared for the trunk to drop when you cut through the boltstud. Have the trunk propped up higher than the trunk shocks naturally extend so the trunk does not fall when you cut through the ball stud.
Oh and don't try and take both trunk shocks off at once. As you will see for yourself the trunk is quite heavy even with just one trunk shock off. Remove and replace the trunk shocks one at a time, otherwise you may end up with a trunk smashed on your head or hands.
Whomever was in charge of designing the stock Toyota trunk shocks probably did not take into account that they would one day have to be replaced. The way they are designed they are very difficult to remove. The two bolts at the bottom of the trunk shock are no problem. It's the ballstud-bolt at the top that takes work getting out. The screw is thread-locked in using locktite or some other screw adhesive. This means it is nearly impossible to remove (you will strip the bolt trying) unless you first apply direct heat to the bolt. I will get to that later on. In addition, the ballstud-bolt is made out of a cheap pot-metal that easily bends and strips. This is why I recommend cutting through the ball stud and then using a socket wrench to remove the bolt. You are much less likely to strip the bolt torquing it with a socket wrench from six sides of the bolt rather than only two sides from a hard to reach angle with pliers or a wrench.
You should always replace your trunk shocks in pairs, so don't buy just one. Be sure you have two different sided trunk shocks. They are labeled either L (left) and R (right) or, A (left) and B (right):
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