After seeing seeing an awesome writeup on here I decided to tackle my brake job instead of taking it in since they wanted over $200 just to install them. Well, right away I ran into a big problem. The two 21mm torque bolts were extremely difficult to get out. A friend and I literally took 4 hours trying to figure out how to remove these. They would back out a half inch at a time and when they would, they would pop and creak real loud. We finally got them out after hours of trying. We were using a breaker bar with an extra pipe on the end for extra leverage. The bolts had some sort of gray compound on them after we finally got them out. The last time my brakes were worked on was about 2 years ago when I took it to the dealership to do some break work and turning of my front rotors. I just worry now that I may need to do something to the bracket where the bolts go in? I'm obviously going to replace the bolts, but should they go in the brackets okay? Do most Nissan dealerships have these bolts in stock? I'm not sure what the Nissan place did to these bolts, but they were way to hard to get out. I was expecting them to snap at any second. One of the bolts will go back in fine, but the other one won't.