Okay, so you've been reading here and there that these brakes are a good alternative to stock and cheap compared to Z32 brakes. Since I have seen plenty of ideas and some photos around the web and never really any step by step procedure, I figured even the typical n00b would appreciate a somewhat step by step posting. So, what I have here are a few pics of what needs to be done to get these bad boys to sit in there just right. My platform is a '96 SE model, so I am not including any five lug swap or re-drilling in these steps.
1. First, remove your wheel(s) from the front.
2. Using a 12mm Socket or wrench, remove the bolt with the brake line from the back of the caliper, draining it into a drain pan of some sort.
3. Using a 14mm (I believe it is anyway) remove the caliper bolts from the stock calipers.
4. Using a 18mm (might be 19mm) remove the caliper brackets.
5. Remove the stock rotor.
6. Now, depending on the method you prefer, remove the dust shield (I chose using a air cutting wheel, then used a grinder to smooth out lose ends. If you decide to take the route I did, use a hammer (or rubber mallet like I did) and beat the shield back a bit so as to ensure the dust shield doesn't rub the back of your new thicker rotors.
7. Okay, I will show the picture of this when photobucket stops being stupid, but the bolt for the q45 bracket is a bit longer then the 240sx bolt. And if you are doing this swap you will see that the bracket for the stock caliper is deeper at the bolting point than the Q45 bracket (sorry, no photo of that). I think it's odd how that works out, but my solution was to use the stock 240sx bracket bolts. Using the washers from both bolts, thread it down. Works perfectly.
8. Install your brake pad retaining clips (I think that's what they are called) at the top and bottom and then slide your pads in.
9. Next push the caliper piston down (if it is a used caliper not ready for install) using a "C" clamp and an old brake pad or small piece of wood.
10. Now, slide the caliper on and then put the bolts through and tighten them down using a 17mm (pretty sure on this one).
11. Bleed your brakes, starting from the caliper furthest from the brake master cylinder working your way to the closest one, in this case, starting rear passenger, then doing the rear driver, then the passenger front, then the driver front.
12. Put your wheels back on.
13. Brag to all your friends that you are now mechanically inclined.
Q45 calipers are still in the bracket here:
Removing the old bracket:
Cutting the dust shield, ALWAYS wear eye protection. I was also getting flakes thrown in my face so I improvised using my shirt and later a wet rag. You can also see that I needed to remove a good portion of the dust shield where the bracket bolts up.
The Mounting Bolts as described above: